id label title paragraph sentence 0 1 Evaporation 1 Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase. 1 1 Evaporation 1 The surrounding gas must not be saturated with the evaporating substance. 2 1 Evaporation 1 When the molecules of the liquid collide, they transfer energy to each other based on how they collide with each other. 3 1 Evaporation 1 When a molecule near the surface absorbs enough energy to overcome the vapor pressure, it will escape and enter the surrounding air as a gas. 4 1 Evaporation 1 When evaporation occurs, the energy removed from the vaporized liquid will reduce the temperature of the liquid, resulting in evaporative cooling. 5 1 Evaporation 2 On average, only a fraction of the molecules in a liquid have enough heat energy to escape from the liquid. 6 1 Evaporation 2 The evaporation will continue until an equilibrium is reached when the evaporation of the liquid is equal to its condensation. 7 1 Evaporation 2 In an enclosed environment, a liquid will evaporate until the surrounding air is saturated. 8 1 Evaporation 3 Evaporation is an essential part of the water cycle. 9 1 Evaporation 3 The sun (solar energy) drives evaporation of water from oceans, lakes, moisture in the soil, and other sources of water. 10 1 Evaporation 3 In hydrology, evaporation and transpiration (which involves evaporation within plant stomata) are collectively termed evapotranspiration. 11 1 Evaporation 3 Evaporation of water occurs when the surface of the liquid is exposed, allowing molecules to escape and form water vapor; this vapor can then rise up and form clouds. 12 1 Evaporation 3 With sufficient energy, the liquid will turn into vapor. 13 1 Evaporation 4 For molecules of a liquid to evaporate, they must be located near the surface, they have to be moving in the proper direction, and have sufficient kinetic energy to overcome liquid-phase intermolecular forces. 14 1 Evaporation 4 When only a small proportion of the molecules meet these criteria, the rate of evaporation is low. 15 1 Evaporation 4 Since the kinetic energy of a molecule is proportional to its temperature, evaporation proceeds more quickly at higher temperatures. 16 1 Evaporation 4 As the faster-moving molecules escape, the remaining molecules have lower average kinetic energy, and the temperature of the liquid decreases. 17 1 Evaporation 4 This phenomenon is also called evaporative cooling. 18 1 Evaporation 4 This is why evaporating sweat cools the human body. 19 1 Evaporation 4 Evaporation also tends to proceed more quickly with higher flow rates between the gaseous and liquid phase and in liquids with higher vapor pressure. 20 1 Evaporation 4 For example, laundry on a clothes line will dry (by evaporation) more rapidly on a windy day than on a still day. 21 1 Evaporation 4 Three key parts to evaporation are heat, atmospheric pressure (determines the percent humidity), and air movement. 22 1 Evaporation 5 On a molecular level, there is no strict boundary between the liquid state and the vapor state. 23 1 Evaporation 5 Instead, there is a Knudsen layer, where the phase is undetermined. 24 1 Evaporation 5 Because this layer is only a few molecules thick, at a macroscopic scale a clear phase transition interface cannot be seen. 25 1 Evaporation 6 Liquids that do not evaporate visibly at a given temperature in a given gas (e.g., cooking oil at room temperature) have molecules that do not tend to transfer energy to each other in a pattern sufficient to frequently give a molecule the heat energy necessary to turn into vapor. 26 1 Evaporation 6 "However, these liquids ""are"" evaporating." 27 1 Evaporation 6 It is just that the process is much slower and thus significantly less visible. 28 1 Evaporation 7 If evaporation takes place in an enclosed area, the escaping molecules accumulate as a vapor above the liquid. 29 1 Evaporation 7 Many of the molecules return to the liquid, with returning molecules becoming more frequent as the density and pressure of the vapor increases. 30 1 Evaporation 7 "When the process of escape and return reaches an equilibrium, the vapor is said to be ""saturated"", and no further change in either vapor pressure and density or liquid temperature will occur." 31 1 Evaporation 7 For a system consisting of vapor and liquid of a pure substance, this equilibrium state is directly related to the vapor pressure of the substance, as given by the Clausius–Clapeyron relation: 32 1 Evaporation 8 "where ""P"", ""P"" are the vapor pressures at temperatures ""T"", ""T"" respectively, Δ""H"" is the enthalpy of vaporization, and ""R"" is the universal gas constant." 33 1 Evaporation 8 The rate of evaporation in an open system is related to the vapor pressure found in a closed system. 34 1 Evaporation 8 If a liquid is heated, when the vapor pressure reaches the ambient pressure the liquid will boil. 35 1 Evaporation 9 The ability for a molecule of a liquid to evaporate is based largely on the amount of kinetic energy an individual particle may possess. 36 1 Evaporation 9 Even at lower temperatures, individual molecules of a liquid can evaporate if they have more than the minimum amount of kinetic energy required for vaporization. 37 1 Evaporation 10 Note: Air used here is a common example; however, the vapor phase can be other gases. 38 1 Evaporation 12 "In the US, the National Weather Service measures the actual rate of evaporation from a standardized ""pan"" open water surface outdoors, at various locations nationwide." 39 1 Evaporation 12 Others do likewise around the world. 40 1 Evaporation 12 The US data is collected and compiled into an annual evaporation map. 41 1 Evaporation 12 The measurements range from under 30 to over per year. 42 1 Evaporation 13 Evaporation is an endothermic process, in that heat is absorbed during evaporation. 43 1 Evaporation 15 Fuel droplets vaporize as they receive heat by mixing with the hot gases in the combustion chamber. 44 1 Evaporation 15 Heat (energy) can also be received by radiation from any hot refractory wall of the combustion chamber. 45 1 Evaporation 16 Internal combustion engines rely upon the vaporization of the fuel in the cylinders to form a fuel/air mixture in order to burn well. 46 1 Evaporation 16 The chemically correct air/fuel mixture for total burning of gasoline has been determined to be 15 parts air to one part gasoline or 15/1 by weight. 47 1 Evaporation 16 Changing this to a volume ratio yields 8000 parts air to one part gasoline or 8,000/1 by volume. 48 1 Evaporation 17 Thin films may be deposited by evaporating a substance and condensing it onto a substrate, or by dissolving the substance in a solvent, spreading the resulting solution thinly over a substrate, and evaporating the solvent. 49 1 Evaporation 17 The Hertz–Knudsen equation is often used to estimate the rate of evaporation in these instances. 50 1 Rainforest 1 Rainforests are forests characterized by high and continuous rainfall, with annual rainfall in the case of tropical rainforests between , and definitions varying by region for temperate rainforests. 51 1 Rainforest 1 The monsoon trough, alternatively known as the intertropical convergence zone, plays a significant role in creating the climatic conditions necessary for the Earth's tropical rainforests: which are distinct from monsoonal areas of seasonal tropical forest. 52 1 Rainforest 2 Estimates vary from 40% to 75% of all biotic species are indigenous to the rainforests. 53 1 Rainforest 2 There may be many millions of species of plants, insects and microorganisms still undiscovered in tropical rainforests. 54 1 Rainforest 2 "Tropical rainforests have been called the ""jewels of the Earth"" and the ""world's largest pharmacy"", because over one quarter of natural medicines have been discovered there." 55 1 Rainforest 2 Rainforests are also responsible for 28% of the world's oxygen turnover, sometimes misnamed oxygen production, processing it through photosynthesis from carbon dioxide and consuming it through respiration. 56 1 Rainforest 3 The undergrowth in some areas of a rainforest can be restricted by poor penetration of sunlight to ground level. 57 1 Rainforest 3 If the leaf canopy is destroyed or thinned, the ground beneath is soon colonized by a dense, tangled growth of vines, shrubs and small trees, called a jungle. 58 1 Rainforest 3 "The term ""jungle"" is also sometimes applied to tropical rainforests generally." 59 1 Rainforest 4 Rainforests as well as endemic rainforest species are rapidly disappearing due to deforestation, the resulting habitat loss and pollution of the atmosphere. 60 1 Rainforest 5 Tropical rainforests are characterized by a warm and wet climate with no substantial dry season: typically found within 10 degrees north and south of the equator. 61 1 Rainforest 5 Mean monthly temperatures exceed during all months of the year. 62 1 Rainforest 5 Average annual rainfall is no less than and can exceed although it typically lies between and . 63 1 Rainforest 6 Many of the world's tropical forests are associated with the location of the monsoon trough, also known as the intertropical convergence zone. 64 1 Rainforest 6 The broader category of tropical moist forests are located in the equatorial zone between the Tropic of Cancer and Tropic of Capricorn. 65 1 Rainforest 6 Tropical rainforests exist in Southeast Asia (from Myanmar (Burma)) to the Philippines, Malaysia, Indonesia, Papua New Guinea and Sri Lanka; also in Sub-Saharan Africa from the Cameroon to the Congo (Congo Rainforest), South America (e.g. 66 1 Rainforest 6 the Amazon rainforest), Central America (e.g. 67 1 Rainforest 6 Bosawás, the southern Yucatán Peninsula-El Peten-Belize-Calakmul), Australia, and on Pacific Islands (such as Hawaii). 68 1 Rainforest 6 "Tropical forests have been called the ""Earth's lungs"", although it is now known that rainforests contribute little net oxygen addition to the atmosphere through photosynthesis." 69 1 Rainforest 7 Tropical forests cover a large part of the globe, but temperate rainforests only occur in few regions around the world. 70 1 Rainforest 7 Temperate rainforests are rainforests in temperate regions. 71 1 Rainforest 7 They occur in North America (in the Pacific Northwest in Alaska, British Columbia, Washington, Oregon and California), in Europe (parts of the British Isles such as the coastal areas of Ireland and Scotland, southern Norway, parts of the western Balkans along the Adriatic coast, as well as in Galicia and coastal areas of the eastern Black Sea, including Georgia and coastal Turkey), in East Asia (in southern China, Highlands of Taiwan, much of Japan and Korea, and on Sakhalin Island and the adjacent Russian Far East coast), in South America (southern Chile) and also in Australia and New Zealand. 72 1 Rainforest 8 A tropical rainforest typically has a number of layers, each with different plants and animals adapted for life in that particular area. 73 1 Rainforest 8 Examples include the emergent, canopy, understory and forest floor layers. 74 1 Rainforest 9 The emergent layer contains a small number of very large trees called emergents, which grow above the general canopy, reaching heights of 45–55 m, although on occasion a few species will grow to 70–80 m tall. 75 1 Rainforest 9 They need to be able to withstand the hot temperatures and strong winds that occur above the canopy in some areas. 76 1 Rainforest 9 Eagles, butterflies, bats and certain monkeys inhabit this layer. 77 1 Rainforest 10 The canopy layer contains the majority of the largest trees, typically to tall. 78 1 Rainforest 10 The densest areas of biodiversity are found in the forest canopy, a more or less continuous cover of foliage formed by adjacent treetops. 79 1 Rainforest 10 The canopy, by some estimates, is home to 50 percent of all plant species. 80 1 Rainforest 10 Epiphytic plants attach to trunks and branches, and obtain water and minerals from rain and debris that collects on the supporting plants. 81 1 Rainforest 10 The fauna is similar to that found in the emergent layer, but more diverse. 82 1 Rainforest 10 A quarter of all insect species are believed to exist in the rainforest canopy. 83 1 Rainforest 10 Scientists have long suspected the richness of the canopy as a habitat, but have only recently developed practical methods of exploring it. 84 1 Rainforest 10 "As long ago as 1917, naturalist William Beebe declared that ""another continent of life remains to be discovered, not upon the Earth, but one to two hundred feet above it, extending over thousands of square miles." 85 1 Rainforest 10 True exploration of this habitat only began in the 1980s, when scientists developed methods to reach the canopy, such as firing ropes into the trees using crossbows. 86 1 Rainforest 10 Exploration of the canopy is still in its infancy, but other methods include the use of balloons and airships to float above the highest branches and the building of cranes and walkways planted on the forest floor. 87 1 Rainforest 10 The science of accessing tropical forest canopy using airships or similar aerial platforms is called dendronautics. 88 1 Rainforest 11 The understory or understorey layer lies between the canopy and the forest floor. 89 1 Rainforest 11 It is home to a number of birds, snakes and lizards, as well as predators such as jaguars, boa constrictors and leopards. 90 1 Rainforest 11 The leaves are much larger at this level and insect life is abundant. 91 1 Rainforest 11 Many seedlings that will grow to the canopy level are present in the understory. 92 1 Rainforest 11 Only about 5% of the sunlight shining on the rainforest canopy reaches the understory. 93 1 Rainforest 11 "This layer can be called a ""shrub layer"", although the shrub layer may also be considered a separate layer." 94 1 Rainforest 12 The forest floor, the bottom-most layer, receives only 2% of the sunlight. 95 1 Rainforest 12 Only plants adapted to low light can grow in this region. 96 1 Rainforest 12 Away from riverbanks, swamps and clearings, where dense undergrowth is found, the forest floor is relatively clear of vegetation because of the low sunlight penetration. 97 1 Rainforest 12 It also contains decaying plant and animal matter, which disappears quickly, because the warm, humid conditions promote rapid decay. 98 1 Rainforest 12 Many forms of fungi growing here help decay the animal and plant waste. 99 1 Rainforest 13 More than half of the world's species of plants and animals are found in the rainforest. 100 1 Rainforest 13 Rainforests support a very broad array of fauna, including mammals, reptiles, birds and invertebrates. 101 1 Rainforest 13 Mammals may include primates, felids and other families. 102 1 Rainforest 13 Reptiles include snakes, turtles, chameleons and other families; while birds include such families as vangidae and Cuculidae. 103 1 Rainforest 13 Dozens of families of invertebrates are found in rainforests. 104 1 Rainforest 13 Fungi are also very common in rainforest areas as they can feed on the decomposing remains of plants and animals. 105 1 Rainforest 14 The great diversity in rainforest species is in large part the result of diverse and numerous physical refuges, i.e. 106 1 Rainforest 14 places in which plants are inaccessible to many herbivores, or in which animals can hide from predators. 107 1 Rainforest 14 Having numerous refuges available also results in much higher total biomass than would otherwise be possible. 108 1 Rainforest 15 Despite the growth of vegetation in a tropical rainforest, soil quality is often quite poor. 109 1 Rainforest 15 Rapid bacterial decay prevents the accumulation of humus. 110 1 Rainforest 15 The concentration of iron and aluminium oxides by the laterization process gives the oxisols a bright red colour and sometimes produces mineral deposits such as bauxite. 111 1 Rainforest 15 Most trees have roots near the surface, because there are insufficient nutrients below the surface; most of the trees' minerals come from the top layer of decomposing leaves and animals. 112 1 Rainforest 15 On younger substrates, especially of volcanic origin, tropical soils may be quite fertile. 113 1 Rainforest 15 If rainforest trees are cleared, rain can accumulate on the exposed soil surfaces, creating run-off and beginning a process of soil erosion. 114 1 Rainforest 15 Eventually streams and rivers form and flooding becomes possible. 115 1 Rainforest 15 There are several reasons for the poor soil quality: First is that the soil is highly acidic. 116 1 Rainforest 15 The roots of plants rely on an acidity difference between the roots and the soil in order to absorb nutrients. 117 1 Rainforest 15 When the soil is acidic, there is little difference, and therefore little absorption of nutrients from the soil. 118 1 Rainforest 15 Second, the type of clay particles present in tropical rainforest soil has a poor ability to trap nutrients and stop them from washing away. 119 1 Rainforest 15 Even if humans artificially add nutrients to the soil, the nutrients mostly wash away and are not absorbed by the plants. 120 1 Rainforest 15 Thirdly, the type of clay particles present in tropical rainforest soil has a poor ability to trap nutrients and stop them from washing away. 121 1 Rainforest 15 Even if humans artificially added nutrients to the soil, the nutrients would still mostly wash away and not absorbed by the plants. 122 1 Rainforest 15 Finally, these soils are poor due to the high volume of rain in tropical rainforests washes nutrients out of the soil more quickly than in other climates. 123 1 Rainforest 16 A natural rainforest emits and absorbs vast quantities of carbon dioxide. 124 1 Rainforest 16 On a global scale, long-term fluxes are approximately in balance, so that an undisturbed rainforest would have a small net impact on atmospheric carbon dioxide levels, though they may have other climatic effects (on cloud formation, for example, by recycling water vapour). 125 1 Rainforest 16 No rainforest today can be considered to be undisturbed. 126 1 Rainforest 16 Human-induced deforestation plays a significant role in causing rainforests to release carbon dioxide, as do other factors, whether human-induced or natural, which result in tree death, such as burning and drought. 127 1 Rainforest 16 Some climate models operating with interactive vegetation predict a large loss of Amazonian rainforest around 2050 due to drought, forest dieback and the subsequent release of more carbon dioxide. 128 1 Rainforest 16 Five million years from now, the Amazon rainforest may long since have dried and transformed itself into savannah, killing itself in the process (changes such as this may happen even if all human deforestation activity ceases overnight). 129 1 Rainforest 17 Tropical rainforests provide timber as well as animal products such as meat and hides. 130 1 Rainforest 17 Rainforests also have value as tourism destinations and for the ecosystem services provided. 131 1 Rainforest 17 Many foods originally came from tropical forests, and are still mostly grown on plantations in regions that were formerly primary forest. 132 1 Rainforest 17 Also, plant-derived medicines are commonly used for fever, fungal infections, burns, gastrointestinal problems, pain, respiratory problems, and wound treatment. 133 1 Rainforest 17 At the same time, rainforests are usually not used sustainably by non-native peoples but are being exploited or removed for agricultural purposes. 134 1 Rainforest 18 On January 18, 2007, FUNAI reported also that it had confirmed the presence of 67 different uncontacted tribes in Brazil, up from 40 in 2005. 135 1 Rainforest 18 With this addition, Brazil has now overtaken the island of New Guinea as the country having the largest number of uncontacted tribes. 136 1 Rainforest 18 The province of Irian Jaya or West Papua in the island of New Guinea is home to an estimated 44 uncontacted tribal groups. 137 1 Rainforest 18 The tribes are in danger because of the deforestation, especially in Brazil. 138 1 Rainforest 19 Central African rainforest is home of the Mbuti pygmies, one of the hunter-gatherer peoples living in equatorial rainforests characterised by their short height (below one and a half metres, or 59 inches, on average). 139 1 Rainforest 19 "They were the subject of a study by Colin Turnbull, ""The Forest People"", in 1962." 140 1 Rainforest 19 Pygmies who live in Southeast Asia are, amongst others, referred to as “Negrito”. 141 1 Rainforest 19 There are many tribes in the rainforests of the Malaysian state of Sarawak. 142 1 Rainforest 19 Sarawak is part of Borneo, the third largest island in the world. 143 1 Rainforest 19 Some of the other tribes in Sarawak are: the Kayan, Kenyah, Kejaman, Kelabit, Punan Bah, Tanjong, Sekapan, and the Lahanan. 144 1 Rainforest 19 "Collectively, they are referred to as Dayaks or Orangulu which means ""people of the interior""." 145 1 Rainforest 20 About half of Sarawak's 1.5 million people are Dayaks. 146 1 Rainforest 20 Most Dayaks, it is believed thropologists, came originally from the South-East Asian mainland. 147 1 Rainforest 20 Their mythologies support this 148 1 Rainforest 21 Tropical and temperate rainforests have been subjected to heavy legal and illegal logging for their valuable hardwoods and agricultural clearance (slash-and-burn, clearcutting) throughout the 20th century and the area covered by rainforests around the world is shrinking. 149 1 Rainforest 21 Biologists have estimated that large numbers of species are being driven to extinction (possibly more than 50,000 a year; at that rate, says E. O. Wilson of Harvard University, a quarter or more of all species on Earth could be exterminated within 50 years) due to the removal of habitat with destruction of the rainforests. 150 1 Rainforest 22 Another factor causing the loss of rainforest is expanding urban areas. 151 1 Rainforest 22 Littoral rainforest growing along coastal areas of eastern Australia is now rare due to ribbon development to accommodate the demand for seachange lifestyles. 152 1 Rainforest 23 Forests are being destroyed at a rapid pace. 153 1 Rainforest 23 Almost 90% of West Africa's rainforest has been destroyed. 154 1 Rainforest 23 Since the arrival of humans, Madagascar has lost two thirds of its original rainforest. 155 1 Rainforest 23 At present rates, tropical rainforests in Indonesia would be logged out in 10 years and Papua New Guinea in 13 to 16 years. 156 1 Rainforest 23 According to Rainforest Rescue, an important reason for the increasing deforestation rate, especially in Indonesia, is the expansion of oil palm plantations to meet growing demand for cheap vegetable fats and biofuels. 157 1 Rainforest 23 In Indonesia, palm oil is already cultivated on nine million hectares and, together with Malaysia, the island nation produces about 85 percent of the world's palm oil. 158 1 Rainforest 24 Several countries, notably Brazil, have declared their deforestation a national emergency. 159 1 Rainforest 24 Amazon deforestation jumped by 69% in 2008 compared to 2007's twelve 160 1 Rainforest 24 months, according to official government data. 161 1 Rainforest 25 "However, a January 30, 2009 ""New York Times"" article stated, ""By one estimate, for every acre of rainforest cut down each year, more than 50 acres of new forest are growing in the tropics." 162 1 Rainforest 25 The new forest includes secondary forest on former farmland and so-called degraded forest. 163 1 Cotyledon 1 "A cotyledon (; ""seed leaf"" from Latin ""cotyledon"", from Greek: κοτυληδών ""kotylēdōn"", gen.: κοτυληδόνος ""kotylēdonos"", from κοτύλη ""kotýlē"" ""cup, bowl"") is a significant part of the embryo within the seed of a plant, and is defined as ""the embryonic leaf in seed-bearing plants, one or more of which are the first to appear from a germinating seed." 164 1 Cotyledon 1 The number of cotyledons present is one characteristic used by botanists to classify the flowering plants (angiosperms). 165 1 Cotyledon 1 "Species with one cotyledon are called monocotyledonous (""monocots"")." 166 1 Cotyledon 1 "Plants with two embryonic leaves are termed dicotyledonous (""dicots"")." 167 1 Cotyledon 2 In the case of dicot seedlings whose cotyledons are photosynthetic, the cotyledons are functionally similar to leaves. 168 1 Cotyledon 2 However, true leaves and cotyledons are developmentally distinct. 169 1 Cotyledon 2 Cotyledons are formed during embryogenesis, along with the root and shoot meristems, and are therefore present in the seed prior to germination. 170 1 Cotyledon 2 True leaves, however, are formed post-embryonically (i.e. 171 1 Cotyledon 2 after germination) from the shoot apical meristem, which is responsible for generating subsequent aerial portions of the plant. 172 1 Cotyledon 3 "The cotyledon of grasses and many other monocotyledons is a highly modified leaf composed of a ""scutellum"" and a ""coleoptile""." 173 1 Cotyledon 3 The scutellum is a tissue within the seed that is specialized to absorb stored food from the adjacent endosperm. 174 1 Cotyledon 3 "The coleoptile is a protective cap that covers the ""plumule"" (precursor to the stem and leaves of the plant)." 175 1 Cotyledon 4 Gymnosperm seedlings also have cotyledons, and these are often variable in number (multicotyledonous), with from 2 to 24 cotyledons forming a whorl at the top of the hypocotyl (the embryonic stem) surrounding the plumule. 176 1 Cotyledon 4 Within each species, there is often still some variation in cotyledon numbers, e.g. 177 1 Cotyledon 4 "Monterey pine (""Pinus radiata"") seedlings have 5–9, and Jeffrey pine (""Pinus jeffreyi"") 7–13 (Mirov 1967), but other species are more fixed, with e.g." 178 1 Cotyledon 4 Mediterranean cypress always having just two cotyledons. 179 1 Cotyledon 4 "The highest number reported is for big-cone pinyon (""Pinus maximartinezii""), with 24 (Farjon & Styles 1997)." 180 1 Cotyledon 5 The cotyledons may be ephemeral, lasting only days after emergence, or persistent, enduring at least a year on the plant. 181 1 Cotyledon 5 The cotyledons contain (or in the case of gymnosperms and monocotyledons, have access to) the stored food reserves of the seed. 182 1 Cotyledon 5 As these reserves are used up, the cotyledons may turn green and begin photosynthesis, or may wither as the first true leaves take over food production for the seedling. 183 1 Cotyledon 6 Cotyledons may be either epigeal, expanding on the germination of the seed, throwing off the seed shell, rising above the ground, and perhaps becoming photosynthetic; or hypogeal, not expanding, remaining below ground and not becoming photosynthetic. 184 1 Cotyledon 6 The latter is typically the case where the cotyledons act as a storage organ, as in many nuts and acorns. 185 1 Cotyledon 7 Hypogeal plants have (on average) significantly larger seeds than epigeal ones. 186 1 Cotyledon 7 They are also capable of surviving if the seedling is clipped off, as meristem buds remain underground (with epigeal plants, the meristem is clipped off if the seedling is grazed). 187 1 Cotyledon 7 The tradeoff is whether the plant should produce a large number of small seeds, or a smaller number of seeds which are more likely to survive. 188 1 Cotyledon 8 The ultimate development of the epigeal habit is represented by a few plants, mostly in the family Gesneriaceae in which the cotyledon persists for a lifetime. 189 1 Cotyledon 8 "Such a plant is ""Streptocarpus wendlandii"" of South Africa in which one cotyledon grows to be up to 75 centimeters (2.5 feet) in length and up to 61 cm (two feet) in width (the largest cotyledon of any dicot, and exceeded only by ""Lodoicea"")." 190 1 Cotyledon 8 Adventitious flower clusters form along the midrib of the cotyledon. 191 1 Cotyledon 8 The second cotyledon is much smaller and ephemeral. 192 1 Cotyledon 9 Related plants may show a mixture of hypogeal and epigeal development, even within the same plant family. 193 1 Cotyledon 9 "Groups which contain both hypogeal and epigeal species include, for example, the Southern Hemisphere conifer family Araucariaceae, the pea family, Fabaceae, and the genus ""Lilium"" (see Lily seed germination types)." 194 1 Cotyledon 9 "The frequently garden grown common bean, ""Phaseolus vulgaris"", is epigeal, while the closely related runner bean, ""Phaseolus coccineus"", is hypogeal." 195 1 Cotyledon 10 "The term ""cotyledon"" was coined by Marcello Malpighi (1628–1694)." 196 1 Cotyledon 10 "John Ray was the first botanist to recognize that some plants have two and others only one, and eventually the first to recognize the immense importance of this fact to systematics, in ""Methodus plantarum"" (1682)." 197 1 Cotyledon 11 Theophrastus (3rd or 4th century BC) and Albertus Magnus (13th century) may also have recognized the distinction between the dicotyledons and monocotyledons. 198 1 Lithosphere 1 "A lithosphere ( [""lithos""] for ""rocky"", and [""sphaira""] for ""sphere"") is the rigid, outermost shell of a terrestrial-type planet, or natural satellite, that is defined by its rigid mechanical properties." 199 1 Lithosphere 1 On Earth, it is composed of the crust and the portion of the upper mantle that behaves elastically on time scales of thousands of years or greater. 200 1 Lithosphere 1 The outermost shell of a rocky planet, the crust, is defined on the basis of its chemistry and mineralogy. 201 1 Lithosphere 2 The layer under the lithosphere is known as the asthenosphere. 202 1 Lithosphere 3 Earth's lithosphere includes the crust and the uppermost mantle, which constitute the hard and rigid outer layer of the Earth. 203 1 Lithosphere 3 The lithosphere is subdivided into tectonic plates. 204 1 Lithosphere 3 The uppermost part of the lithosphere that chemically reacts to the atmosphere, hydrosphere, and biosphere through the soil forming process is called the pedosphere. 205 1 Lithosphere 3 The lithosphere is underlain by the asthenosphere which is the weaker, hotter, and deeper part of the upper mantle. 206 1 Lithosphere 3 The Lithosphere-Asthenosphere boundary is defined by a difference in response to stress: the lithosphere remains rigid for very long periods of geologic time in which it deforms elastically and through brittle failure, while the asthenosphere deforms viscously and accommodates strain through plastic deformation. 207 1 Lithosphere 4 The concept of the lithosphere as Earth's strong outer layer was described by A.E.H. 208 1 Lithosphere 4 "Love in his 1911 monograph ""Some problems of Geodynamics"" and further developed by Joseph Barrell, who wrote a series of papers about the concept and introduced the term ""lithosphere""." 209 1 Lithosphere 4 The concept was based on the presence of significant gravity anomalies over continental crust, from which he inferred that there must exist a strong, solid upper layer (which he called the lithosphere) above a weaker layer which could flow (which he called the asthenosphere). 210 1 Lithosphere 4 "These ideas were expanded by Reginald Aldworth Daly in 1940 with his seminal work ""Strength and Structure of the Earth." 211 1 Lithosphere 4 They have been broadly accepted by geologists and geophysicists. 212 1 Lithosphere 4 These concepts of a strong lithosphere resting on a weak asthenosphere are essential to the theory of plate tectonics. 213 1 Lithosphere 5 There are two types of lithosphere: 214 1 Lithosphere 5 The thickness of the lithosphere is considered to be the depth to the isotherm associated with the transition between brittle and viscous behavior. 215 1 Lithosphere 5 The temperature at which olivine begins to deform viscously (~1000 °C) is often used to set this isotherm because olivine is generally the weakest mineral in the upper mantle. 216 1 Lithosphere 5 Oceanic lithosphere is typically about 50–140 km thick (but beneath the mid-ocean ridges is no thicker than the crust), while continental lithosphere has a range in thickness from about 40 km to perhaps 280 km; the upper ~30 to ~50 km of typical continental lithosphere is crust. 217 1 Lithosphere 5 The mantle part of the lithosphere consists largely of peridotite. 218 1 Lithosphere 5 The crust is distinguished from the upper mantle by the change in chemical composition that takes place at the Moho discontinuity. 219 1 Lithosphere 6 Oceanic lithosphere consists mainly of mafic crust and ultramafic mantle (peridotite) and is denser than continental lithosphere, for which the mantle is associated with crust made of felsic rocks. 220 1 Lithosphere 6 Oceanic lithosphere thickens as it ages and moves away from the mid-ocean ridge. 221 1 Lithosphere 6 This thickening occurs by conductive cooling, which converts hot asthenosphere into lithospheric mantle and causes the oceanic lithosphere to become increasingly thick and dense with age. 222 1 Lithosphere 6 In fact, oceanic lithosphere is a thermal boundary layer for the convection in the mantle. 223 1 Lithosphere 6 The thickness of the mantle part of the oceanic lithosphere can be approximated as a thermal boundary layer that thickens as the square root of time. 224 1 Lithosphere 7 Here, formula_2 is the thickness of the oceanic mantle lithosphere, formula_3 is the thermal diffusivity (approximately 10 m/s) for silicate rocks, and formula_4 is the age of the given part of the lithosphere. 225 1 Lithosphere 7 The age is often equal to L/V, where L is the distance from the spreading centre of mid-oceanic ridge, and V is velocity of the lithospheric plate. 226 1 Lithosphere 8 Oceanic lithosphere is less dense than asthenosphere for a few tens of millions of years but after this becomes increasingly denser than asthenosphere. 227 1 Lithosphere 8 This is because the chemically differentiated oceanic crust is lighter than asthenosphere, but thermal contraction of the mantle lithosphere makes it more dense than the asthenosphere. 228 1 Lithosphere 8 The gravitational instability of mature oceanic lithosphere has the effect that at subduction zones, oceanic lithosphere invariably sinks underneath the overriding lithosphere, which can be oceanic or continental. 229 1 Lithosphere 8 New oceanic lithosphere is constantly being produced at mid-ocean ridges and is recycled back to the mantle at subduction zones. 230 1 Lithosphere 8 As a result, oceanic lithosphere is much younger than continental lithosphere: the oldest oceanic lithosphere is about 170 million years old, while parts of the continental lithosphere are billions of years old. 231 1 Lithosphere 8 "The oldest parts of continental lithosphere underlie cratons, and the mantle lithosphere there is thicker and less dense than typical; the relatively low density of such mantle ""roots of cratons"" helps to stabilize these regions." 232 1 Lithosphere 9 "Geophysical studies in the early 21st century posit that large pieces of the lithosphere have been subducted into the mantle as deep as 2900 km to near the core-mantle boundary, while others ""float"" in the upper mantle, while some stick down into the mantle as far as 400 km but remain ""attached"" to the continental plate above, similar to the extent of the ""tectosphere"" proposed by Jordan in 1988." 233 1 Lithosphere 10 Geoscientists can directly study the nature of the subcontinental mantle by examining mantle xenoliths brought up in kimberlite, lamproite, and other volcanic pipes. 234 1 Lithosphere 10 The histories of these xenoliths have been investigated by many methods, including analyses of abundances of isotopes of osmium and rhenium. 235 1 Lithosphere 10 Such studies have confirmed that mantle lithospheres below some cratons have persisted for periods in excess of 3 billion years, despite the mantle flow that accompanies plate tectonics. 236 1 Australian Greens 1 The Australian Greens, commonly known as The Greens, are a centre-left, green political party in Australia. 237 1 Australian Greens 1 As of the 2019 federal election, the Greens are currently the third largest political party in Australia by vote. 238 1 Australian Greens 1 The current leader of the party is Richard Di Natale, and the party's co-deputy leaders are Adam Bandt and Larissa Waters. 239 1 Australian Greens 2 The party was formed in 1992 and is a confederation of eight state and territorial parties. 240 1 Australian Greens 2 The party cites four core values: ecological sustainability, social justice, grassroots democracy and peace and non-violence. 241 1 Australian Greens 3 Party constituencies can be traced to various origins – notably the early environmental movement in Australia and the formation of the United Tasmania Group (UTG), one of the first green parties in the world, but also the nuclear disarmament movement in Western Australia and sections of the industrial left in New South Wales. 242 1 Australian Greens 3 Co-ordination between environmentalist groups occurred in the 1980s with various significant protests. 243 1 Australian Greens 3 Key people involved in these campaigns included Bob Brown and Christine Milne who went on to contest and win seats in the Tasmanian Parliament and eventually form the Tasmanian Greens; both Brown and Milne subsequently became leaders of the federal party. 244 1 Australian Greens 4 The Australian Greens' policies cover a wide range of issues. 245 1 Australian Greens 4 Most notably, the party favours environmentalism, including expansion of recycling facilities; phasing out single-use plastics; conservation efforts; better water management; and addressing species extinction, habitat loss and deforestation in Australia. 246 1 Australian Greens 4 The Greens strongly support efforts to address climate change, by transitioning away from the burning of fossil fuels to renewable energy production in the next decade, as well as reintroducing a carbon price. 247 1 Australian Greens 4 The party supports lowering household electricity prices through the creation of a publicly-owned renewable energy provider, and building thousands of new jobs in renewable energy generation. 248 1 Australian Greens 4 On economic issues, the Greens oppose tax cuts that solely benefit the top bracket of income earners and lead to socioeconomic inequality and believe that all essential services need to be adequately funded to suit community needs; and argue for the recreation of a publicly-owned bank. 249 1 Australian Greens 4 The Greens have campaigned on free undergraduate university and TAFE, paid for by ending tax avoidance and fossil fuel subsidies, as well as restoring funding to the education sectors. 250 1 Australian Greens 4 The party is in favour of extending Medicare coverage to dental and mental health care, and supports reproductive health rights and voluntary euthanasia. 251 1 Australian Greens 4 The Greens are often known for their outspoken advocacy on numerous social issues, such as the legalisation of same-sex marriage, the right to seek asylum and gender equality. 252 1 Australian Greens 4 The party supports drug law reform, including the legalisation of cannabis; treating drug use as a health issue rather than a criminal issue; and community pill-testing. 253 1 Australian Greens 4 The party supports animal welfare policies and stringent gun control legislation. 254 1 Australian Greens 4 "The Greens also advocate for policies that they believe will strengthen Australian democracy and ""clean up politics"", including capping political donations and instituting a federal anti-corruption watchdog." 255 1 Australian Greens 5 Following the 2016 federal election, the Australian Greens had nine senators and one member in the lower house, 23 elected representatives across state and territory parliaments, more than 100 local councillors, and over 15,000 party members (as of 2016). 256 1 Australian Greens 5 All Senate and House of Representatives seats were retained at the 2019 election. 257 1 Australian Greens 6 The formation of the Australian Greens in 1992 brought together over a dozen green groups, from state and local organisations, some of which had existed for 20 years. 258 1 Australian Greens 7 The precursor to the Tasmanian Greens (the earliest existent member of the federation of parties that is the Australian Greens), the United Tasmania Group, was founded in 1972 to oppose the construction of new dams to flood Lake Pedder. 259 1 Australian Greens 7 The campaign failed to prevent the flooding of Lake Pedder and the party failed to gain political representation. 260 1 Australian Greens 7 One of the party's candidates was Bob Brown, then a doctor in Launceston. 261 1 Australian Greens 8 In the late 1970s and 1980s, a public campaign to prevent the construction of the Franklin Dam in Tasmania saw environmentalist and activist Norm Sanders elected to the Tasmanian House of Assembly as an Australian Democrat. 262 1 Australian Greens 8 Brown, then director of the Wilderness Society, contested the election as an independent, but failed to win a seat. 263 1 Australian Greens 9 In 1982 Norm Sanders resigned from the THA, and Brown was elected to replace him in a countback. 264 1 Australian Greens 10 During her 1984 visit to Australia, West German Greens parliamentarian Petra Kelly urged that the various Greens groups in Australia develop a national identity. 265 1 Australian Greens 10 Partly as a result of this, 50 Greens activists gathered in Tasmania in December to organise a national conference. 266 1 Australian Greens 11 "The title ""The Greens"" had been first registered in Sydney in the 1980s by what ""The Monthly Magazine"" described as ""a band of inner-city radicals committed to resident action, nuclear disarmament and urban environmental causes, such as stopping expressways and preserving parklands""." 267 1 Australian Greens 11 "The group formed as the Sydney Greens and evolved into the Green Alliance, with the stated aim of not forming a ""traditional hierarchy party""." 268 1 Australian Greens 11 "According to party co-ordinator Hall Greenland, when amalgamation with Bob Brown's Tasmanian movement was first mooted, Brown was hesitant owing to what he perceived as the ""anarchic leftism"" of the Sydney movement." 269 1 Australian Greens 11 The Greens NSW and The Greens (WA) were also wary of amalgamation owing to local autonomy concerns and a 1986 attempt by Brown to form a national party failed. 270 1 Australian Greens 11 The movement for a national party continued however. 271 1 Australian Greens 11 In an effort to reduce the influence of the Democratic Socialist Party (formerly Socialist Workers Party, now Socialist Alliance) in The Greens NSW, Brown successfully moved for a ban on dual party membership by Greens in 1991. 272 1 Australian Greens 11 "Following formation of the national party in 1992, regional emphasis variations remained within the Greens, with members of the ""industrial left"" remaining a presence in the New South Wales branch." 273 1 Australian Greens 12 The Green movement gained its first federal parliamentary representative when Senator Jo Vallentine of Western Australia, who had been elected in 1984 for the Nuclear Disarmament Party and later sat as an independent, was part of the formation of and joined The Greens (WA), a party formed in Western Australia, and not affiliated to the Australian Greens at that time. 274 1 Australian Greens 13 In 1992, representatives from around the nation gathered in North Sydney and agreed to form the Australian Greens, although the state Greens parties, particularly in Western Australia, retained their separate identities for a period. 275 1 Australian Greens 13 Brown resigned from the Tasmanian Parliament in 1993, and in 1996 he was elected as a senator for Tasmania, the first elected as an Australian Greens candidate. 276 1 Australian Greens 14 Initially the most successful Greens group during this period was The Greens (WA), at that time still a separate organisation from the Australian Greens. 277 1 Australian Greens 14 Vallentine was succeeded by Christabel Chamarette in 1992, and she was joined by Dee Margetts in 1993. 278 1 Australian Greens 14 But Chamarette was defeated in the 1996 federal election. 279 1 Australian Greens 14 Margetts opposed the industrial relations reform agenda of the Howard Government. 280 1 Australian Greens 14 "Following the 'Cavalcade to Canberra' protest of 19 August 1996, in which 2000 breakaway civilians rioted in and around Parliament House, Margetts told the Senate that ""The Greens (WA) do not associate ourselves with the violent action"" and that while ""there are obviously some in the Greens movement who have differing opinions about that"" she personally did not think there was ""any justification for the use of violence to the extent that we saw""." 281 1 Australian Greens 14 Margetts lost her seat in the 1998 federal election, leaving Brown as the sole Australian Greens senator. 282 1 Australian Greens 15 The national party initially resisted appointing a party leader, however Bob Brown was later selected. 283 1 Australian Greens 15 The New South Wales Greens remained ideologically opposed to appointing a leader and continue not to appoint such a position. 284 1 Australian Greens 15 The WA Greens had lost office in the Senate by 1998, leaving Bob Brown as the sole representative of the party. 285 1 Australian Greens 15 Thereafter, the national vote was set to increase consecutively at elections up until 2010. 286 1 Australian Greens 16 In the 2001 federal election, Brown was re-elected as a senator for Tasmania, and a second Greens senator, Kerry Nettle, was elected in New South Wales. 287 1 Australian Greens 16 "The Greens opposed the Howard Government's Pacific Solution of offshore processing for asylum seekers, and opposed the bipartisan offers of support to the US alliance and Afghanistan War by the government and Beazley Opposition in the aftermath of the 11 September terrorist attacks in 2001, describing the Afghanistan commitment as ""warmongering""." 288 1 Australian Greens 16 This contributed to increased support for the Greens by disaffected Labor Party voters and helped identify the Greens as more than just a single-issue environmental party. 289 1 Australian Greens 16 On 19 October 2002 the Greens won a House of Representatives seat for the first time when Michael Organ won the Cunningham by-election. 290 1 Australian Greens 17 "In the lead-up to the Iraq War, in September 2002, Bob Brown said that the Greens would oppose military action in Iraq regardless of the position of the United Nations Security Council and said that any conflict would be ""a vengeance for the S11 attack that's involved here as well as the American corporations wanting to get their hands on the Iraqi oil"" and that if Saddam Hussein ""does have weapons of mass destruction, the attack might be the thing that gets him to use them"", so it would be better to ""resolv[e] the Palestinian crisis, which could lead—open up a real avenue to peace in the Middle East, and neutralise Saddam Hussein by doing it""." 291 1 Australian Greens 18 In the 2004 federal election, the Greens' primary vote rose by 2.3% to 7.2%. 292 1 Australian Greens 18 This won them two additional Senate seats, taken by Christine Milne in Tasmania and Rachel Siewert in Western Australia, bringing the total to four. 293 1 Australian Greens 18 However, the success of the Howard Government in winning a majority in the Senate meant that the Greens' influence on legislation decreased. 294 1 Australian Greens 18 Michael Organ was defeated by the Labor Party candidate in Cunningham. 295 1 Australian Greens 19 "Additionally, in the 2004 election there was an intense media campaign from the socially conservative Family First Party, including a television advertisement labelling the Greens the ""Extreme Greens""." 296 1 Australian Greens 19 Competitive preferencing strategies prompted by the nature of Senate balloting (see Australian electoral system) lead to the Australian Labor Party and the Democrats ranking Family First higher than the Greens on their Senate tickets, and the Greens losing preferences they would normally have received from the two parties. 297 1 Australian Greens 19 Consequently, although outpolling Family First by a ratio of more than four to one first-preference votes, Victorian Family First candidate Steve Fielding was elected on preferences over the Australian Greens' David Risstrom, an unintended consequence of these strategies. 298 1 Australian Greens 19 In Tasmania, Christine Milne only narrowly gained her Senate seat before a Family First candidate, despite obtaining almost the full required quota of primary votes. 299 1 Australian Greens 19 "It was only the high incidence of ""below-the-line"" voting in Tasmania that negated the effect of the preference-swap deal between Labor and Family First." 300 1 Australian Greens 20 The Australian Greens fielded candidates in every House of Representatives seat in Australia, and for all state and territory Senate positions. 301 1 Australian Greens 20 The Greens (WA) were able to win Legislative Council seats in rural and remote-area seats (Mining and Pastoral, Agricultural and South West provinces). 302 1 Australian Greens 21 In 2005, the Greens' Lee Rhiannon lobbied the Vatican to reject Australian Cardinal George Pell as a candidate for the Papacy on the basis of his support for conservative Catholic moral doctrine. 303 1 Australian Greens 21 "In 2007, Rhiannon referred remarks made by Pell opposing embryonic stem cell research to the New South Wales parliamentary privileges committee for allegedly being in ""contempt of parliament""." 304 1 Australian Greens 21 "Pell was cleared of the charge and described the move as a ""clumsy attempt to curb religious freedom and freedom of speech""." 305 1 Australian Greens 22 The Australian Greens' primary vote increased by 4.1% in the 2006 South Australia election, 1.% in the 2006 Queensland election, and 0.7% in the 2007 election in New South Wales. 306 1 Australian Greens 23 The results for the 2006 Victoria election were mixed, with an improved vote for the Greens in the lower house, but a fall in their upper-house vote. 307 1 Australian Greens 24 Against this upward trend was a swing of 1.5% away from the Greens in the 2006 Tasmania state election. 308 1 Australian Greens 25 "On 31 August 2004, the Melbourne newspaper the ""Herald Sun"" published a page-three-story by journalist Gerard McManus entitled ""Greens back illegal drugs"" in the lead-up to the 2004 federal election." 309 1 Australian Greens 25 In response to the article, Brown lodged a complaint with the Australian Press Council. 310 1 Australian Greens 25 After the election, the Press Council upheld Brown's complaint. 311 1 Australian Greens 25 "An appeal by the ""Herald Sun"" was dismissed and it was ordered to publish the Press Council's adjudication." 312 1 Australian Greens 26 As in previous years, the Greens' vote was strongest in inner-city seats, including Melbourne (22.7% of primary votes), Sydney (20.7%), Grayndler (18.7%), Denison (18.6%) and Batman (17.2%). 313 1 Australian Greens 26 Strong votes were also recorded in Liberal-held city based seats such as Higgins (10.8%), Kooyong (11.8%) Curtin (13.4%) and Wentworth (15.0%). 314 1 Australian Greens 26 The primary vote for the Greens in suburban and regional areas was generally smaller. 315 1 Australian Greens 27 The Greens directly contributed to Howard's defeat in his own electorate, the Sydney-area seat of Bennelong. 316 1 Australian Greens 27 Greens candidate Lindsay Peters received 5.5% of the primary vote. 317 1 Australian Greens 27 He was eliminated after the 14th count, and more than three-fourths of his preferences went to Labor challenger Maxine McKew. 318 1 Australian Greens 27 This margin was enough to make McKew only the second person to unseat a sitting prime minister. 319 1 Australian Greens 28 The Greens increased their national vote by 1.38 points to 9.04% at the 2007 federal election, with a net increase of one senator to a total of five. 320 1 Australian Greens 28 Senators Bob Brown (Tas) and Kerry Nettle (NSW) were up for re-election, Brown was re-elected, but Nettle was unsuccessful, becoming the only Australian Greens senator to lose their seat. 321 1 Australian Greens 28 Elected at the 2001 federal election on a primary vote of 4.36% in New South Wales with One Nation and micro-party preference flows, she failed to gain re-election in 2007 due to preferences, despite an increase in the New South Wales Green primary vote to 8.43%. 322 1 Australian Greens 28 Other Greens Senate candidates were Larissa Waters (Qld), Richard Di Natale (Vic), Scott Ludlam (WA), Sarah Hanson-Young (SA) and Kerrie Tucker (ACT). 323 1 Australian Greens 28 Ludlam and Hanson-Young were elected and took up office on 26 August 2008 when all senators elected on 24 November 2007 were sworn in. 324 1 Australian Greens 29 "This was also the first general election for the Greens in which a lower house seat went ""maverick""." 325 1 Australian Greens 29 In the Division of Melbourne, the Greens polled 22.80% of the primary vote, overtaking the Liberals on preferences, finishing on a two-party-preferred figure of 45.29% against Labor. 326 1 Australian Greens 30 An extensive campaign was undertaken in the ACT, in an attempt to end coalition control of the Senate immediately after the election, as territory senators take their place at this time as opposed to their state counterparts on the next 1 July. 327 1 Australian Greens 30 The ACT elects two seats with terms (in parallel with those of the House of Representatives), so a larger quota than normal is required for election. 328 1 Australian Greens 30 Despite a swing of 5.1 points to the Greens, on 21.5%, their best result in any state or territory, the party fell significantly short of the required quota. 329 1 Australian Greens 31 At the 2008 Northern Territory election, the Greens ran in six of the 25 seats in the unicameral parliament, averaging 16% of the vote but won no seats. 330 1 Australian Greens 31 At the 2008 Western Australian election, the Greens won 11–12 percent of the statewide vote in both the lower and upper houses, with four of 36 seats in the latter, an increase of two. 331 1 Australian Greens 32 In the 2008 Australian Capital Territory election, conducted under the Hare-Clark system of proportional representation, the Greens doubled their vote to around 15%, going from one to four seats in the 17-member unicameral parliament, giving them the balance of power. 332 1 Australian Greens 32 After almost two weeks of deliberations, the Greens chose to allow Labor to form a minority government. 333 1 Australian Greens 32 The Greens held the post of Speaker in the ACT Legislative Assembly, the first for a Green party in Australia. 334 1 Australian Greens 33 In November 2008, Senator Christine Milne was elected deputy leader in a ballot contested against Senator Rachel Siewert. 335 1 Australian Greens 34 In May 2009, the Greens won their second-ever single-member electorate, with Adele Carles winning the Fremantle by-election for the Western Australian Legislative Assembly. 336 1 Australian Greens 34 The seat had been held by the Labor Party since 1924. 337 1 Australian Greens 34 It was the first time the Greens had outpolled the Labor Party on the primary vote in any Labor-held seat. 338 1 Australian Greens 35 In December 2009, the Greens received over 30 percent of the primary vote in the federal Higgins by-election in Victoria, in the absence of a Labor candidate. 339 1 Australian Greens 35 It is the highest primary vote recorded by the Greens in a Liberal-held lower-house seat. 340 1 Australian Greens 36 At the 2010 Tasmanian election, the Greens won 21.6 percent of the primary vote amongst the five multi-member electorates, resulting in the Greens winning five of twenty-five seats in the lower house and holding the balance of power. 341 1 Australian Greens 36 With Labor and the Liberals winning ten seats each, the Greens backed a Labor minority government. 342 1 Australian Greens 36 Tasmanian Greens Leader Nick McKim was appointed to the new Labor-Green cabinet, making him the first Green Minister in Australia. 343 1 Australian Greens 37 "In the lead-up to the 2010 Australian federal election, the Australian Christian Lobby and the Catholic Archbishop of Sydney criticised Greens policies as ""anti-Christian""." 344 1 Australian Greens 37 "In an 8 August opinion article for Sydney's ""Sunday Telegraph"" newspaper, Cardinal Archbishop George Pell wrote that the Greens were hostile to the family, opposed to religious schools, had pressured against Catholic management of Calvary Hospital in Canberra and said the party contained Stalinists and a wing who were ""watermelons"" -""green on the outside, red on the inside"" whose policies were ""impractical and expensive, which will not help the poor""." 345 1 Australian Greens 37 "In response to the article, Senator Bob Brown said Pell was ""bearing false witness"" and that the Greens were in fact, ""much closer to mainstream Christian thinking than Cardinal Pell""." 346 1 Australian Greens 37 Jesuit human rights lawyer Fr. 347 1 Australian Greens 37 "Frank Brennan responded in an essay by saying that while some Greens might be anti-Christian, others like Lin Hatfield Dodds ""have given distinguished public service in their churches for decades." 348 1 Australian Greens 37 "On some policy issues, wrote Brennan, ""the Greens have a more Christian message than the major parties"", while on issues such as abortion, stem-cell research, same-sex marriage and funding for church schools, the party would never be able to ""carry the day given that policy changes in these areas will occur only if they are supported by a majority from both major political parties""." 349 1 Australian Greens 38 "In the lead up to the 2010 election, Bob Brown opposed the senate pre-selection of high-profile New South Wales Green Lee Rhiannon in favour of environmentalist Cate Faehrmann, saying that the Greens needed ""new blood""." 350 1 Australian Greens 38 Rhiannon, a socialist who had also campaigned on gun control, foreign aid, political donations and urban renewal said that there were differing visions for the future of the Greens – one of increased centralisation of party decision making versus a vision she supported of empowering membership. 351 1 Australian Greens 38 Rhiannon was confirmed as the candidate. 352 1 Australian Greens 39 At the 2010 federal election the Greens received a four percent swing to finish with 13 percent of the vote (more than 1.6 million votes) in the Senate, a first for any Australian minor party. 353 1 Australian Greens 39 The Senate vote throughout the states was between 10 and 20 percent. 354 1 Australian Greens 39 The Greens won a seat in each of the six states at the election, again a first for any Australian minor party, bringing the party to a total of nine senators from July 2011, holding the balance of power in the Senate. 355 1 Australian Greens 39 The new senators were Lee Rhiannon in New South Wales, Richard Di Natale in Victoria, Larissa Waters in Queensland, Rachel Siewert in Western Australia, Penny Wright in South Australia and Christine Milne in Tasmania. 356 1 Australian Greens 39 Incumbents Scott Ludlam in Western Australia, Sarah Hanson-Young in South Australia and Bob Brown in Tasmania were not due for re-election. 357 1 Australian Greens 39 The Greens also won their first House of Representatives seat at a general election, the seat of Melbourne with candidate Adam Bandt, who was a crossbencher in the first hung parliament since the 1940 federal election. 358 1 Australian Greens 39 Almost two weeks after the election, Bandt and the Greens agreed to support a Gillard Labor minority government on confidence and supply votes. 359 1 Australian Greens 39 Labor was returned to government with the additional support of three independent crossbenchers. 360 1 Australian Greens 40 The election resulted in a hung parliament. 361 1 Australian Greens 40 Six crossbench MPs shared the balance of power. 362 1 Australian Greens 40 The Greens signed a formal agreement with the Australian Labor Party involving consultation in relation to policy and support in the House of Representatives in relation to confidence and supply and three of the independents declared their support for Labor on confidence and supply, allowing Gillard and Labor to remain in power with a 76–74 minority government. 363 1 Australian Greens 41 In the 2010 Victorian election, the Liberal party directed voters to preference the ALP ahead of the Greens. 364 1 Australian Greens 41 The Greens' primary vote increased slightly overall from 10.04% to 10.6% of the overall vote, but the party did not win any lower-house seats. 365 1 Australian Greens 41 "Federal Greens leader Bob Brown said of the result that it was positive but that: ""The Liberals' preferencing to Labor means that instead of there being three Greens in the new parliament there won't be""." 366 1 Australian Greens 42 "On 24 February 2011, in a joint press conference of the ""Climate Change Committee"" – comprising the Government, Greens and two independent MPs – Prime Minister Gillard announced a plan to legislate for the introduction of a fixed price to be imposed on ""carbon pollution"" from 1 July 2012 The carbon price would be placed for three to five years before a full emissions trading scheme is implemented, under a blueprint agreed by a multi-party parliamentary committee." 367 1 Australian Greens 42 Key issues remained to be negotiated between the Government and the cross-benches, including compensation arrangements for households and businesses, the carbon price level, the emissions reduction target and whether or not to include fuel in the price. 368 1 Australian Greens 43 The Greens support protecting the welfare of the people of Libya and so supported the United States-led military intervention in Libya. 369 1 Australian Greens 43 "The view of Deputy leader Christine Milne, that the Greens ""want to make sure that [they] protect civilians wherever [they] can... to ensur[e] that we will save lives..."", is commensurate with this position." 370 1 Australian Greens 44 At the Greens NSW State Conference, which was held prior to the New South Wales state election in 2011, a resolution was adopted in support for the Boycott, Divestment and Sanctions campaign against Israel. 371 1 Australian Greens 44 The move, proposed by Sylvia Hale and backed by Lee Rhiannon, had already been rejected by Leader Bob Brown. 372 1 Australian Greens 44 "Soon after, however, their motion was backed by the Marrickville Council – resulting in a ""boycott [against] all goods made in Israel and any sporting, academic, government or cultural exchanges""." 373 1 Australian Greens 44 "Local Labor MP Anthony Albanese called the move ""misguided"", sparking media interest and inciting anger among many Jewish Australians." 374 1 Australian Greens 44 The move also caused a rift within the Greens. 375 1 Australian Greens 44 Following the 2010 election, Bob Brown said that he had conveyed his disapproval of this policy to Rhiannon. 376 1 Australian Greens 44 "Brown said that the policy was ""a mistake"" made by the NSW branch whereas Rhiannon said it had not been prosecuted hard enough." 377 1 Australian Greens 45 "Amidst ongoing debate over taxation, industry policy and climate change, Leader Bob Brown began to refer to sections within the Australian media that expressed criticism of Greens' policies or candidates as the ""hate media"", singling out the Murdoch Press in particular." 378 1 Australian Greens 46 "Outlining his industry and climate policies on ABC's 7:30 Program in May 2011, Bob Brown voiced support for a reduction in subsidies to fossil fuel industries, the implementation of a price on carbon; a higher level of profit tax on the mining industry and a phasing out of Australia's coal export industry, saying: ""The world is going to do that because it is causing massive economic damage down the line through the impact of climate change." 379 1 Australian Greens 47 In 2011, the Greens called for the permanent closure of Australia's live export meat industry, following revelations of mistreatment of Australian cattle in some Indonesian abattoirs. 380 1 Australian Greens 48 On 24 March 2012 Queensland election the total primary vote for The Queensland Greens fell by 0.84% to 7.53%. 381 1 Australian Greens 49 On 13 April 2012, Bob Brown announced that he was resigning as federal parliamentary leader of the Australian Greens and that he would leave the Senate in June. 382 1 Australian Greens 49 Christine Milne was elected unanimously as the new leader by the party. 383 1 Australian Greens 49 MP Adam Bandt was elected deputy leader. 384 1 Australian Greens 49 "The ""ease of the Greens leadership transition"" was widely praised, with one commentator noting ""She has survived the transition in leadership with grace and steadfastness of vision" 385 1 Australian Greens 49 , and Milne set about expanding the party's reach, looking first to regional Australia. 386 1 Australian Greens 50 Milne took the leadership at a time when the Greens nationally had passed a peak. 387 1 Australian Greens 50 In the 18 months between the high water mark of the 2010 Federal Election and Brown's retirement, polls nationally were trending downwards. 388 1 Australian Greens 50 This was reflected in a number of setbacks for state and local Greens parties, which some commentators blamed on Brown's absence. 389 1 Australian Greens 50 The outcome of 20 October 2012 election in the ACT resulted in a reduction of Greens Legislative Assembly members, from four to one. 390 1 Australian Greens 50 The Western Australian election was held in March 2013. 391 1 Australian Greens 50 For the Legislative Assembly, the total primary vote for the Greens fell by 3.52% to 8.40%. 392 1 Australian Greens 50 In the Legislative Council the Greens' representation was reduced from four to two members. 393 1 Australian Greens 51 Even some impressive results which failed to deliver wins, such as the 2012 Melbourne state by-election, where the Greens received the highest number of first preference votes but did not win the seat as some had expected, were used to attack Milne. 394 1 Australian Greens 52 "In a 19 February address to the National Press Club in Canberra, Christine Milne announced that the Federal Greens alliance with the Labor Party was ""effectively over""." 395 1 Australian Greens 52 "In particular, Milne cited a failure by the Gillard Government to redraft the mining tax it had concluded prior to the 2010 Election as evidence that the government had ""walked away"" from its agreement with the Greens." 396 1 Australian Greens 52 "Nevertheless, Milne promised to continue to guarantee confidence and supply to the Labor Government on the floor of Parliament, so as not to ""advance the interests"" of Opposition Leader Tony Abbott." 397 1 Australian Greens 53 "Milne was aware that the period in balance of power would be electorally costly for the party, telling members that ""You earn political capital in opposition and you spend it in power." 398 1 Australian Greens 53 With that in mind, and following the disappointing state results, Milne and the Australian Greens set as their goal for the 2013 election a clear target of retaining their existing seats and perhaps win one more Senate seat in Victoria, rather than to increase the vote nationally. 399 1 Australian Greens 53 Despite a reduction in the vote, maintaining and slightly increasing parliamentary representation is exactly what Milne achieved. 400 1 Australian Greens 54 Christine Milne resigned as leader of the Australian Greens on 6 May 2015. 401 1 Australian Greens 54 Milne was replaced by Victorian senator Richard Di Natale, with Adam Bandt being replaced as deputy leader by Larissa Waters and Scott Ludlam at the same time. 402 1 Australian Greens 55 Richard Di Natale became leader of the Australian Greens following Christine Milne's resignation, on 6 May 2015. 403 1 Australian Greens 56 Under Richard Di Natale, the party has taken a much more pragmatic approach to policy and dealing with government legislation than under previous leaders. 404 1 Australian Greens 57 The party voted in support for legislation that saw assets testing for age pensions reduced from $1M down to $800,000. 405 1 Australian Greens 57 The Greens also negotiated with the government and secured a tax disclosure threshold for big businesses earning more than $200M a year. 406 1 Australian Greens 58 In November 2016 the Greens voted with the Turnbull government to levy a 15% tax on foreign backpackers on working holiday visas. 407 1 Australian Greens 59 At the 2013 federal election the House of Representatives (lower house) primary vote was 8.7 percent (−3.1) with the Senate (upper house) primary vote at 8.7 percent (−4.5). 408 1 Australian Greens 59 Despite that, as targeted, the Greens representation in the parliament increased. 409 1 Australian Greens 59 Adam Bandt retained his Melbourne seat with a primary vote of 42.6 percent (+7.0) and a two-candidate preferred vote of 55.3 percent (−0.6). 410 1 Australian Greens 59 The Greens won four Senate positions, increasing their Senate representation from nine to ten Senators to take effect from 1 July 2014, to a total of eleven Green members in the Parliament of Australia. 411 1 Australian Greens 60 Writing in the Australian Financial Review, Vincent Mahon, a former campaign manager for the Greens, said that while the Greens were able to present positive achievements to the electors relating to education, health, the environment and the promotion of clean energy, the party was unable to attract disenchanted Labor voters. 412 1 Australian Greens 60 He noted that Green policies relating to carbon pricing and refugees were unpopular with many voters. 413 1 Australian Greens 60 Christine Milne said that the Greens support of the Labor minority government was a factor in the Greens' lower vote. 414 1 Australian Greens 61 Following the federal election, South Australian Greens Senator, Sarah Hanson-Young, who had lost a ballot against Senator Milne for Deputy Leadership and lost again to Adam Bandt, publicly criticised Senator Milne. 415 1 Australian Greens 62 "In September 2013, it was reported that six senior Greens' staffers had resigned including Chief of Staff, Ben Oquist, who claimed there were, ""fundamental differences of opinion on strategy""." 416 1 Australian Greens 62 "There have been suggestions that Oquist was behind the unsuccessful attempt to create leadership tensions because he feared moves to ""freeze him out""." 417 1 Australian Greens 63 At the 2014 Western Australian Senate election the Greens won in excess of a quota with the primary vote increasing from 9.5 to 15.6 percent, re-electing Scott Ludlam. 418 1 Australian Greens 63 "Ludlam threw his weight behind Milne's leadership, telling ABC radio on being asked if he had leadership ambitions that ""That's very flattering, but Christine Milne is doing a great job""." 419 1 Australian Greens 64 On 17 July 2015, Wright announced that she would be resigning from the Senate due to illness in her family. 420 1 Australian Greens 65 2016 federal election onward 421 1 Australian Greens 66 At the 2016 federal election the House of Representatives (lower house) primary vote increased to 10.23 percent (+1.58) but decreased in the Senate (upper house), with primary vote at 8.65 percent (−0.58). 422 1 Australian Greens 66 Adam Bandt was elected to a third term in his Melbourne seat with a primary vote of 43.75 percent (+1.13) and a two-candidate preferred vote of 68.48 percent (+13.21). 423 1 Australian Greens 66 Despite a campaign focus on winning additional seats in the lower house, The Greens failed to win any lower house contests. 424 1 Australian Greens 66 Their closest seats were Batman, where the Greens won the most first preference votes and turned the once safe Labor seat into a marginal Labor vs Green seat, and Melbourne Ports, where the Greens were fewer than 1000 votes off overtaking Labor, which would have likely (but not certainly) resulted in a Greens victory. 425 1 Australian Greens 66 Wills, Higgins, Grayndler and Division of Warringah saw Greens make the two-candidate-preferred result. 426 1 Australian Greens 66 Deposits were retained in 141 of the 150 seats. 427 1 Australian Greens 67 The Greens also lost one Senate position in South Australia, decreasing their Senate representation from ten to nine Senators, to a total of ten Green members in the Parliament of Australia. 428 1 Australian Greens 67 "The result was seen as disappointing, and caused internal divisions to flare up, with former Federal Leader Bob Brown calling upon Senator Lee Rhiannon to resign, citing the ""need for renewal""." 429 1 Australian Greens 68 "Tensions within the party reached a flashpoint in late 2016 when a group of Greens members announced their intention to form a faction within the party called ""Left Renewal""." 430 1 Australian Greens 68 "Their stated aim is to ""end capitalism"" and stop ""global imperialism""." 431 1 Australian Greens 68 "The faction's existence is supported by Senator Lee Rhiannon and State MP David Shoebridge, however party leader Richard Di Natale has publicly criticised the grouping saying its manifesto was ""ridiculous"" and its members should consider leaving the Greens." 432 1 Australian Greens 68 "Former leader Bob Brown also attacked the group calling it ""a joke""." 433 1 Australian Greens 69 In June 2017 Lee Rhiannon was suspended from the Federal Greens party room following an internal dispute over her opposition to the Federal Greens' support for the Turnbull government education funding changes. 434 1 Australian Greens 69 The Greens New South Wales subsequently issued a statement reiterating its support for Senator Rhiannon and support for public education. 435 1 Australian Greens 70 On 14 July 2017, Ludlam resigned from the Senate after he found that he had dual Australian-New Zealand citizenship. 436 1 Australian Greens 70 The next week on 18 July 2017, his former co-deputy, and Queensland Senator, Larissa Waters resigned, after discovering that she held dual citizenship with Canada, and that had she been born a week later that would not have been the case. 437 1 Australian Greens 70 Both were ineligible to be elected to Parliament under section 44 of the Australian Constitution. 438 1 Australian Greens 70 Subsequently, Adam Bandt and Rachel Siewert were named as temporary co-deputy leaders until the arrival of Ludlam and Waters' replacements in Canberra. 439 1 Australian Greens 71 In the lead up to the preselection for the Greens NSW Senate position in 2017, it was reported that Senator Rhiannon had breached party rules by allowing supporters to visit her in her Sydney electorate office. 440 1 Australian Greens 71 Rhiannon lost her first position on the NSW Senate ticket, with this position instead going to NSW Greens MLC Mehreen Faruqi. 441 1 Australian Greens 71 Rhiannon announced on May 25, 2019 that she would be resigning from the party in mid-August, to allow Faruqi to fill her vacancy. 442 1 Australian Greens 71 Faruqi had a 25-year career working as a professional engineer and academic, and had previously served in the New South Wales Legislative Council from 2013 to 2018, before assuming her new position in the Federal Parliament. 443 1 Australian Greens 71 Faruqi became the first female Muslim Senator in Australian history. 444 1 Australian Greens 72 "Leading up to the 2019 election, Di Natali stated that, ""Climate change matters more than anything else at this election because it is, quite literally, an existential threat to humanity." 445 1 Australian Greens 72 This has got to be a climate change election because we're running out of time. 446 1 Australian Greens 73 At the 2019 federal election, the Australian Greens received a primary vote of 10.7% in the House of Representatives, with a federal swing of +0.2%. 447 1 Australian Greens 73 The party's highest vote was captured in the Australian Capital Territory (17.1%), followed by Victoria (12.1%), Western Australia (11.9%), Queensland (10.5%), Northern Territory (10.5%), Tasmania (10.3%), South Australia (9.8%) and New South Wales (9.0%). 448 1 Australian Greens 74 On a state-by-state basis in the House of Representatives, the party received favourable swings in South Australia (+3.4%), the Australian Capital Territory (+1.8%), Queensland (+1.5%) and the Northern Territory (+1.1%) but suffered swings in Victoria (-1.2%), Western Australia (-0.4%), New South Wales (-0.2%) and Tasmania (-0.1%). 449 1 Australian Greens 75 The party retained the federal electorate of Melbourne with Adam Bandt sitting at a 71.8% two-party preferred vote. 450 1 Australian Greens 75 The Greens also entered the two-party preferred vote in the electorates of Kooyong (44.3% vs. LIB), Wills (41.8% vs. 451 1 Australian Greens 75 LAB), Cooper (35.4% vs. 452 1 Australian Greens 75 LAB) and Grayndler (33.7% vs. 453 1 Australian Greens 75 LAB). 454 1 Australian Greens 76 In the Senate, the Greens received favourable swings in South Australia (+5.03%), Queensland (+3.12%), the Australian Capital Territory (+1.61%), Western Australia (+1.48%), Tasmania (+1.41%) and New South Wales (+1.32%). 455 1 Australian Greens 76 Small swings against the Greens in the Senate were observed in only Victoria (-0.25%) and the Northern Territory (-0.54%). 456 1 Australian Greens 76 All 6 Greens Senators up for re-election retained their seats, including Senators Mehreen Faruqi, Janet Rice, Larissa Waters, Sarah Hanson-Young, Jordon Steele-John and Nick McKim. 457 1 Australian Greens 77 Three key seats were targeted by the Greens in Victoria, including Kooyong, Higgins and Macnamara. 458 1 Australian Greens 77 Prominent barrister Julian Burnside, who stood for Kooyong, came close to unseating treasurer and deputy Liberal leader Josh Frydenberg, falling short by 5.7% in the two-party preferred vote. 459 1 Australian Greens 77 Greens candidate Jason Ball, for the electorate of Higgins, failed to enter the two-party preferred vote, despite optimism within the Greens and a diminishing Liberal vote. 460 1 Australian Greens 77 In Macnamara (formerly Melbourne Ports), a three-way contest emerged between the Liberals, Labor and Greens. 461 1 Australian Greens 77 Greens candidate Steph Hodgins-May had come within a few hundred votes in 2016 of taking the seat, however, redistributions in the electorate for the 2019 election were unfavourable for the Greens' vote, and the party's final vote sat at 24.2%. 462 1 Australian Greens 78 Post-election, Richard Di Natale was re-endorsed as the Party's leader, and Adam Bandt and Larissa Waters resumed their positions as the party's deputy positions. 463 1 Australian Greens 78 Rachel Siewert took on the role of party whip and Janet Rice became the party room chair. 464 1 Australian Greens 79 The Greens saw an increase in party membership by approximately 10% following the 2019 election, adding more than 1700 new members. 465 1 Australian Greens 79 "Di Natali attributed this rise in membership as ""clearly a response to the election"", continuing that, ""For a lot of people the way to respond to what was for many of them a devastating result, was to actually take some action..." 466 1 Australian Greens 79 This election was described as a 'climate election'. 467 1 Australian Greens 79 Every election from this point on will be a climate election. 468 1 Australian Greens 79 We're breaking record, on record, with extreme weather, drought. 469 1 Australian Greens 79 And I think the community's only going to become increasingly concerned about the lack of [climate] action. 470 1 Australian Greens 79 "Following the dramatic increase in votes for the German Greens Party - where their vote increased from 9% in the 2017 German election to 20.5% in the 2019 European elections - Di Natali has argued that, ""there's a real possibility of the [Australian] Greens seeing that big increase - a similar increase to the increase we saw in Germany." 471 1 Australian Greens 80 "The Australian Greens are part of the global ""green politics"" movement." 472 1 Australian Greens 80 "The charter of the Australian Greens identifies the following as the four pillars of the party's policy: ""social justice"", ""sustainability"", ""grassroots democracy"" and ""peace and non-violence""." 473 1 Australian Greens 80 Major policy initiatives of recent years have also included taxation reform, cost of living, review of the American alliance, and implementation of harm minimisation in relation to drug use. 474 1 Australian Greens 81 "The Greens oppose the importation of animals for zoos in Australia, ""except where the importation will assist the overall conservation of the species""." 475 1 Australian Greens 81 They also seek to ban and phase out respectively the display of wild or domesticated animals in circuses in Australia. 476 1 Australian Greens 82 The Greens are in favour of phasing out live animal exports, with Greens parliamentary leader Richard Di Natale instead favouring investment in the chilled meat industry:“Often what we’re told is that if you phase out the live animal export trade then we’re going to lose a whole lot of jobs. 477 1 Australian Greens 82 But what’s not being told is that if we started to invest in a frozen and chilled meat trade through northern Australia, then we could turn this issue into one where we value-add; one where we create lots of jobs for Australians. 478 1 Australian Greens 82 The Greens have campaigned on ending greyhound racing and banning whale slaughter. 479 1 Australian Greens 82 The party would also place a ban on animal-tested cosmetics and ingredients and end caged egg production and sow stalls, instead favouring ethical farming practices. 480 1 Australian Greens 83 The party acknowledges that methane emissions from livestock need to be reduced as these emissions are a major source of global warming and climate change. 481 1 Australian Greens 83 This would be achieved by supporting new and ongoing research and through the avenues of animal health and nutrition, selection and genetics. 482 1 Australian Greens 84 The Greens strongly support community-driven decision-making processes as a means by which soil and water degradation can be addressed. 483 1 Australian Greens 85 The Greens want it to be easier for consumers to identify locally produced foods by implementing a comprehensive locality of origin labelling system. 484 1 Australian Greens 86 The party wants to improve the uptake of courses in tertiary and vocational agricultural courses, increasing Australia's agricultural skill base and workforce retention. 485 1 Australian Greens 87 Support for farmers experiencing the effects of climate change through droughts, and soil and water degradation has been expressed by the Greens. 486 1 Australian Greens 87 "Another aim of the party is to ensure fair prices for farmers, against growing international competition, and to ""develop and implement an effective framework — including financial incentives, pricing mechanisms, extension services and regulation — to ensure that farmers and land managers are rewarded for the repair and maintenance of ecosystem services." 487 1 Australian Greens 88 The Greens acknowledge that climate change is a threat to ecological habitats, biodiversity, human health and infrastructure. 488 1 Australian Greens 88 "Greens MP Adam Bandt, the party's climate and energy spokesperson, welcomed the UK Parliament's declaration of a ""climate emergency"" and intends to introduce a similar declaration in the Australian Parliament." 489 1 Australian Greens 88 "Bandt stated, ""The UK Parliament has recognised the world is facing an existential climate crisis and that we all need to act urgently." 490 1 Australian Greens 88 I will seek to move a similar motion to the UK and have a state of climate emergency declared here [too]... 491 1 Australian Greens 88 It's time to act as if our house is on fire, because it is... 492 1 Australian Greens 88 The Greens are the only party that supports emergency action. 493 1 Australian Greens 89 "In October 2019, former Liberal Party leader Dr John Hewson supported Adam Bandt's call for a climate emergency declaration, citing that ""climate was an emergency some 30 years ago." 494 1 Australian Greens 89 He urged the Liberal Party to provide a conscience vote on the issue. 495 1 Australian Greens 90 The Greens support the implementation of the Portuguese model when it comes to drug law reform - specifically, the decriminalisation of drugs in favour of treating drug addiction as a health issue rather than merely a law and order issue. 496 1 Australian Greens 90 "The Greens argue that, ""A harm minimisation approach is the most appropriate way to reduce the adverse health, social and economic consequences of drug or substance use, for the individual user and the community"" and that, ""drug policies and programs should be adopted that are evidence-based and subject to continuous evaluation." 497 1 Australian Greens 91 Their approach to drug legalisation is on a case-by-case basis. 498 1 Australian Greens 91 They support legalising cannabis for medical and recreational use and believe the government should regulate the cannabis industry much like it does with the alcohol and tobacco industries. 499 1 Australian Greens 92 The Greens believe that penalties should apply to individuals who drive with impaired cognitive or psychomotor skills as a result of consuming a drug or other substance. 500 1 Australian Greens 92 Criminal penalties are also supported by the Greens for the trafficking or production of commercial quantities of illicit drugs. 501 1 Australian Greens 93 Addressing the problem of inhalant misuse, particularly in rural communities, is an aim of the Greens' drug policies. 502 1 Australian Greens 93 Their policy includes supporting the rollout of measures such as non-sniffable fuel in rural communities where petrol sniffing is considered to be a problem. 503 1 Australian Greens 94 A preventative approach is also taken by the party to address risk factors for substance abuse, such as family violence, sexual assault and trauma. 504 1 Australian Greens 95 The Greens advocate for the use of pill-testing at community events such as festivals. 505 1 Australian Greens 95 This policy is supported by the Australian Medical Association (AMA). 506 1 Australian Greens 96 "The Greens believe the cost of electricity prices can be reduced by creating ""Power Australia"", a not-for-profit, renewable energy provider, which is estimated to reduce power bills by $200 a year for the average consumer." 507 1 Australian Greens 97 Greens leader Richard Di Natale, in a speech delivered to the National Press Club in March 2017, proposed that a discussion be had around the future of work in Australia, arguing that reduced work hours, or a shorter working week, will increase productivity and create new employment opportunities for those wishing to work more hours, while also allowing those wishing to work less the opportunity to do so. 508 1 Australian Greens 97 The shortfall in terms of wages earned would be made up through reform in the social welfare system; specifically, by the implementation of a universal basic income (UBI). 509 1 Australian Greens 97 The Greens advocate for a Future of Work Commission to independently assess the viability of such reforms. 510 1 Australian Greens 98 The party also supports winding back and reforming negative gearing, as well as stamp duty, as a way of reducing the cost of housing. 511 1 Australian Greens 99 "The Greens wish to ""increase the transparency and accountability of the Foreign Investment Review Board (FIRB) in making its decisions against the National Interest Test." 512 1 Australian Greens 99 The National Interest Test should be strengthened to incorporate national, ecological and social objectives. 513 1 Australian Greens 100 "The Greens argue that international companies must comply ""with international human rights, labour and environmental laws and standards""." 514 1 Australian Greens 101 "The party supports a rise in the minimum wage, arguing that in Australia, ""inequality is growing, wages are flat lining and having a full-time job is no longer a guarantee of security." 515 1 Australian Greens 101 Working people need a living wage enshrined in law. 516 1 Australian Greens 101 The Liberal and Labor tax cuts arms race will further entrench inequality. 517 1 Australian Greens 101 A wage increase is better than a tax cut. 518 1 Australian Greens 101 Instead of continuing to hurdle down the road of becoming a US-style unequal society we need to lift the minimum wage, raise Newstart and invest in universal services. 519 1 Australian Greens 102 The Greens acknowledge that inaction on climate change would produce dire economic costs, with evidence suggesting that climate change will negatively impact Australian tourism, a significant economic asset. 520 1 Australian Greens 103 The Greens support free TAFE and university for undergraduate students and believe that schools funding should be determined on the basis of equity and need. 521 1 Australian Greens 103 The party also opposes the casualisation of the workforce and wants to introduce a benchmark of 80% permanent teaching staff throughout public and private VET providers. 522 1 Australian Greens 104 The party wants class sizes to be reduced and teachers' wages to reflect their professionalism, expertise and valuable contribution to the development of young minds. 523 1 Australian Greens 105 The Greens oppose the National School Chaplaincy Program, instead wishing to redirect the funds to qualified, secular school welfare and family support professionals in schools. 524 1 Australian Greens 106 The Greens strongly support the Safe Schools program, an anti-bullying program for schools that focuses on ensuring inclusive environments for same-sex attracted, intersex and gender diverse students, staff and family members. 525 1 Australian Greens 106 "The Greens have also called for an end to discrimination towards students and staff on the basis of their gender identity or sexual orientation in private schools, arguing that, ""[a] person’s sexuality or gender identity should not disqualify them from attending or working at any school." 526 1 Australian Greens 107 The Greens support the mass-rollout of renewable energy, with an aim of 100% renewable energy production by 2030, and phasing out the use of coal-fired power, as a means of driving investment and creating jobs. 527 1 Australian Greens 107 In 2019, the Greens pledged to create 180,000 new jobs in the renewable energy sector, including a renewable energy export industry to replace coal exports. 528 1 Australian Greens 107 This plan would drive billions of dollars of investment in renewable energy. 529 1 Australian Greens 108 The Greens are the only party with an energy policy consistent with keeping global warming at or below 1.5ºC. 530 1 Australian Greens 109 "The party opposes the opening of new coal mines, and has campaigned against the Adani Carmichael coal mine using the slogan ""Stop Adani"", as well as the Abbot Point coal terminal." 531 1 Australian Greens 109 The party calls for the phasing out, closure and rehabilitation of currently operating coal mines; and the putting in place a transition plan for workers. 532 1 Australian Greens 110 The party is strongly opposed to coal-seam gas mining (fracking) and regularly participate and have even organised community demonstrations against the practice. 533 1 Australian Greens 111 "The Greens want to create ""Power Australia"", a not-for-profit, public energy retailer, which would reduce electricity bills by an estimated $200 a year for the average customer." 534 1 Australian Greens 112 The Greens support lowering power prices for small businesses by re-regulating electricity prices through the aforementioned Power Australia energy retailer, which would sell cheaper electricity to small businesses and drive down retail prices. 535 1 Australian Greens 113 "Adam Bandt, Greens spokesperson for energy, has stated:""Small business is bearing the brunt of the old parties' addiction to gas and coal." 536 1 Australian Greens 113 The government loves to talk up its small business credentials, but businesses are talking about closing because Angus Taylor [Liberal MP for energy and emissions reduction] doesn't have the guts to get energy prices under control. 537 1 Australian Greens 113 The Greens will stand up to the big power corporations on behalf of small business. 538 1 Australian Greens 113 In addition to offering cheap, clean electricity packages to small businesses, our package will help businesses fuel switch from gas to electricity... 539 1 Australian Greens 113 The Greens will re-establish programs that were working well before Tony Abbott tore them down, like the Clean Technology Innovation Program. 540 1 Australian Greens 113 The key to helping small business isn't to abandon them with a small government, neoliberal approach, but for government and industry to work cooperatively to help small businesses embrace the clean energy transition. 541 1 Australian Greens 113 Our plan will help small businesses reduce power bills and reduce pollution. 542 1 Australian Greens 114 "The Greens claim to have ""an extensive plan to protect our environment"", including addressing the fact that 1,800 native Australian animal and plant species are currently at risk of extinction." 543 1 Australian Greens 115 The Greens wish to generate new environmental protection laws and instate a national Environmental Protection Agency, which would act independently of politicians and hold the responsibility of enforcing these laws. 544 1 Australian Greens 115 "The Greens argue that ongoing Howard-era environmental laws are ""outdated"" and need to be improved substantially." 545 1 Australian Greens 116 The Greens support a consistent national approach to recycling and support the phasing out of single-use plastics by 2025, including straws, stirrers, cutlery, utensils, plates, bowls and polystyrene containers and cups. 546 1 Australian Greens 116 Similar laws have been introduced in England, planned to be effective in 2020. 547 1 Australian Greens 116 The Greens would establish a Plastics Co-operative Research Centre (CRC), based in Hobart, with the intention of leading Australia's efforts in reducing waste, cleaning up the oceans and finding end-markets for recovered plastic, with federal funding of $50 million over 5 years. 548 1 Australian Greens 116 The Greens also support state-led container deposit schemes (CDS), which provide people with incentives to recycle. 549 1 Australian Greens 117 "$2 billion would be invested by the Greens to improve the water quality of the Great Barrier Reef and ""stop water theft"" from corporations in the Murray-Darling Basin." 550 1 Australian Greens 117 Climate change has caused significant coral bleaching in the Reef. 551 1 Australian Greens 118 "The party does not support support fracking and coal seem gas (CSG), as they ""pose a serious threat to human health, groundwater, agricultural land and community""." 552 1 Australian Greens 119 The Greens argue for democratic reforms to the World Trade Organization, International Monetary Fund and World Bank to better promote sustainable trade and development. 553 1 Australian Greens 120 The party would end Australia's Defence Treaty with the United States unless it can be changed to operate within the Greens' view on Australia's national interest. 554 1 Australian Greens 120 "Former Greens leader Bob Brown argued that, ""The US is a very great friend of Australia and always will be." 555 1 Australian Greens 120 But that doesn't mean that we cave in to their demands. 556 1 Australian Greens 121 In 1991, the Greens stated their opposition to the Gulf War, and in 2003, opposition to the Iraq War. 557 1 Australian Greens 121 The Greens also opposed the Afghanistan War. 558 1 Australian Greens 121 However, the party is not anti-militarism per se, having supported armed intervention in East Timor in 1999, and the 2011 military intervention in Libya. 559 1 Australian Greens 122 The Greens have pledged support for independence movements around the world, including in Palestine, Taiwan, Tibet and West Papua. 560 1 Australian Greens 123 The party calls for improved human rights in countries such as China and Myanmar. 561 1 Australian Greens 123 In 2019, the Greens declared that it does not support the Hong Kong government's proposed new extradition agreement with China. 562 1 Australian Greens 123 "Richard Di Natale stated that, ""The Chinese Government still hasn’t aligned its key criminal laws and policies with international human rights standards." 563 1 Australian Greens 123 It does not always allow criminal suspects access to lawyers. 564 1 Australian Greens 123 It fails to investigate allegations of police torture and to hold police to account. 565 1 Australian Greens 123 It imprisons human rights lawyers, artists and academics. 566 1 Australian Greens 124 The Greens believe that access to health care of a high standard and quality is a basic human right. 567 1 Australian Greens 124 Adequate access to bulk-billing general practitioners (GPs) across Australia is a priority of the party's health policy. 568 1 Australian Greens 125 The Greens support a properly resourced Pharmaceutical Benefits Scheme free from political interference and want the Pharmaceutical Benefits Advisory Committee (PBAC) to be composed of independent experts, clinicians and consumer representatives. 569 1 Australian Greens 126 Improving food labelling to be more comprehensive and strongly enforced is another health policy adopted by the party. 570 1 Australian Greens 126 The party also wish to ban junk food advertising on television during times of high children television viewing. 571 1 Australian Greens 127 The Greens support Medicare and believe that dental and mental health care should be included in Medicare. 572 1 Australian Greens 128 The Greens acknowledge the adverse effects of climate change on human health and, by taking action on climate change, wish to address this issue. 573 1 Australian Greens 129 The Greens are in support of voluntary euthanasia for those who are terminally ill. 574 1 Australian Greens 130 The party supports same-sex marriage, with the intention of improving the mental health of LGBTIQ+ Australians and their families, in line with the position of the Australian Psychological Society (APS). 575 1 Australian Greens 130 "The Greens were the first party to campaign for the legalisation of marriage equality, and Greens MPs often use the slogan ""every vote, every time"" in support." 576 1 Australian Greens 130 Same-sex marriage was made legal in Australia in 2018. 577 1 Australian Greens 130 The Greens also support calls from the APS for an Australia-wide ban on so-called gay 'conversion therapy' due to the harmful mental health effects of sexual orientation change efforts. 578 1 Australian Greens 131 The party also supports reproductive health and expanding abortion services and making access to them easier. 579 1 Australian Greens 132 Alzheimer's Australia National CEO, Carol Bennett publicly welcomed the Greens' $4 billion commitment to a national dementia strategy. 580 1 Australian Greens 132 The party has also committed $5.2 billion to create dementia friendly communities; $8 million for a risk reduction program to inform Australians about brain health; $6 million for early diagnosis; $20 million for post-diagnostic services, including expansion of the National Dementia Helpline; $64 million for a dementia-respite supplement and to develop a consumer initiative to support individuals with dementia navigate the aged care system; and $20 million to improve dementia research. 581 1 Australian Greens 133 The party is very vocal in speaking in favour of the rights of asylum seekers, and to this end support the abolishing of indefinite offshore detention of asylum seekers, as well as the practice of asylum seeker boat turn backs. 582 1 Australian Greens 134 In the 2016 federal election, the Greens proposed a one-time intake of 50,000 refugees from Syrian refugee camps, contrasting with the Coalition who proposed an intake of 12,000 and Labor who proposed an intake of 30,000. 583 1 Australian Greens 135 The Greens favour establishing a migrant program that prioritises family reunion and facilitates migration or resettlement to Australia within a reasonable time. 584 1 Australian Greens 137 The Greens are strongly in favour of expanding public transport, and support the building of a high speed rail network between Sydney and Melbourne. 585 1 Australian Greens 138 They also call for the establishment of an infrastructure bank, with the aim of increasing federal infrastructure investment to $75 billion as a means of funding, among other things, public transport, public housing, and maintaining existing infrastructure including local government roads and storm water. 586 1 Australian Greens 139 The Greens support the construction of the national broadband network, as initially envisioned by the Rudd Government, which would increase fibre optic home connections. 587 1 Australian Greens 140 At the 2016 federal election, the Greens announced a policy to strengthen anti-discrimination laws; achieve same-sex marriage; stand up for the rights of intersex people; defend Safe Schools; provide better access to HIV-prevention medication known as PrEP; change retrograde state laws including on adoption rights and the 'gay panic' defence; provide easier access to hormone treatments for transgender and gender diverse young people; bring refugees being processed in countries which criminalise homosexuality to Australia; improve mental health for LGBTIQ people; provide training for LGBTIQ inclusive aged-care services; remove the gay blood ban, and lift aid funding including for HIV prevention projects. 588 1 Australian Greens 140 The Greens also wish to ban so-called gay 'conversion therapy'. 589 1 Australian Greens 141 "A convenor of the ACT Greens party has said when same-sex marriage is limited to, ""two consenting adults [this] discriminates against others in the gay community, including polyamorists""." 590 1 Australian Greens 141 He accused the Greens of being hypocrites because the logic they use to argue for marriage equality should extend to people who have multiple partners. 591 1 Australian Greens 141 However, others have argued that the Greens policy does not constitute discrimination as limiting the number of partners to two within a marriage does not distinguish between any physical, cultural or diverse characteristics an individual possesses. 592 1 Australian Greens 142 The Greens would like to establish a federal Office for LGBTI People, as part of the Department of the Prime Minister and Cabinet, and believe Australia should have a dedicated Commissioner for Sexual Orientation, Gender Identity and Intersex Rights at the Australian Human Rights Commission with powers equivalent to existining commissioners. 593 1 Australian Greens 143 The Australian Greens support the elimination of weapons of mass destruction as well as global disarmament. 594 1 Australian Greens 144 The party does not believe that Australia should participate in or subsidise the sale of weaponry. 595 1 Australian Greens 144 They argue that it is irresponsible of the Australian government to fund weapon exports to Saudi Arabia, which is the world's largest state sponsor of terrorism. 596 1 Australian Greens 145 "The Greens support an Australian Defence Force (ADF) ""adequate to Australia's defence and peacekeeping needs." 597 1 Australian Greens 145 The party also supports the use of trade embargoes and other economic sanctions in addressing global conflicts rather than direct military action. 598 1 Australian Greens 146 The party supports a law and order response to counter violent extremism, as well as intelligence work, prevention strategies and community level programs. 599 1 Australian Greens 146 The Greens have pledged $10 million a year for countering violent extremism. 600 1 Australian Greens 146 The party argues that the government needs to properly fund counterterrorism research. 601 1 Australian Greens 146 "The party believes that it is incumbent upon political leaders to condemn white supremacy and the emerging neo-Nazi movement, which is ""taking a foothold around the world, emboldened and encouraged by political leaders." 602 1 Australian Greens 147 The Greens support stringent gun control legislation and argue that the Australian community is put at risk by the presence of more than 260,000 firearms in the illicit firearms market. 603 1 Australian Greens 147 The party believe that all political donations from the gun lobby should be banned. 604 1 Australian Greens 147 From 2011-2018, pro-gun groups have donated thousands of dollars to Australian political parties, including Katter's Australia Party ($808,760), the Shooters' Party ($699,834), the Coalition ($82,525), the Liberal Democratic Party ($37,311), the Labor Party ($33,032) and One Nation ($6,203). 605 1 Australian Greens 148 The Greens want Australia to reverse cuts to science and technology funding. 606 1 Australian Greens 148 The Greens would inject $19.4 billion into the sector over the next decade. 607 1 Australian Greens 149 The Greens' science and research policy, launched at the Walter and Eliza Hall Institute of Medical Research (Australia's oldest medical research institute) includes: 608 1 Australian Greens 151 "Greens MP Adam Bandt stated:""By winding back unfair tax breaks to big polluters and big corporations, we can invest $19.4 billion into science, research and innovation to set us up for the future." 609 1 Australian Greens 151 Australia is lagging behind. 610 1 Australian Greens 151 Commonwealth investment in research and development is at its lowest level in 40 years. 611 1 Australian Greens 151 The old parties are stuck in the past. 612 1 Australian Greens 151 They're addicted to the donations of old, entrenched and polluting industries so they don't have a vision or the ability to usher in the jobs and industries of the future. 613 1 Australian Greens 151 This plan will put Australia on a path to joining other advanced countries that spend 4% of GDP on research and development. 614 1 Australian Greens 152 The Australian Greens support a progressive taxation system. 615 1 Australian Greens 152 The party is concerned about tax avoidance by large corporations. 616 1 Australian Greens 152 For example, during the 2016-2017 period, 722 of Australia's largest corporations paid $0 in tax, according to a report by the Australian Taxation Office. 617 1 Australian Greens 153 "At the 2010 federal election, the party advocated for an increase in the company tax rate to 33% and an increase in the Gillard Government's Mineral Resource Rent Tax; a new top marginal tax rate of 50%; the reintroduction of estate duties; a ""Tobin tax"" on foreign currency transactions; that family trusts be taxed as ""companies""; the introduction of road congestion charges; and elimination of fringe benefit tax concessions for cars." 618 1 Australian Greens 154 "Despite widespread media reports during 2019 that the party supported a ""death tax"", estate duties were disendorsed and removed from the Australian Greens' policy platform in November 2012." 619 1 Australian Greens 154 The policy had not been a part of their platform for several years. 620 1 Australian Greens 154 "Despite being mistruths, the ""death tax"" scare campaign was promoted by several Liberal MPs, including Treasurer Josh Frydenberg, Corangamite MP Sarah Henderson, Hughes MP Craig Kelly, and Senator Jane Hume, as well as Pauline Hanson." 621 1 Australian Greens 154 "The Greens state clearly on their website that, ""We [The Greens] do not have any proposal for an inheritance tax in our election platform." 622 1 Australian Greens 155 The party argues that its plans could be paid for by generating billions of dollars from amending taxation laws that favour large corporations, including: 623 1 Australian Greens 157 In 2018, the party also endorsed removal of tax exemptions for religious organisations. 624 1 Australian Greens 158 In 2019, the Greens voted against the Liberal government's $158 billion tax cut, arguing that it would disproportionately favour the wealthiest income earners in Australia. 625 1 Australian Greens 158 "Di Natale accused Labor of becoming ""simply a paler version of the Morrison government"", arguing that ""by voting for $158 billion in revenue cuts that will hurt people doing it tough and line the pockets of millionaires, Anthony Albanese has abandoned the mantle of opposition leader"", and declaring the Greens the ""real opposition""." 626 1 Australian Greens 159 On Saturday 12 November 2005 at the national conference in Hobart the Australian Greens abandoned their long-standing tradition of having no official leader and approved a process whereby a parliamentary leader could be elected by the Greens Parliamentary Party Room. 627 1 Australian Greens 159 "On Monday 28 November 2005, Bob Brown – who had long been regarded as ""de facto"" leader by many inside the party, and most people outside the party – was elected unopposed as the Parliamentary Party Leader." 628 1 Australian Greens 159 The current leadership team is Richard Di Natale as leader and Adam Bandt and Larissa Waters serving as co-deputy leaders. 629 1 Australian Greens 160 The Australian Greens, like all Australian political parties, is federally organised with separately registered state parties signing up to a national constitution, yet retaining considerable policy-making and organisational autonomy from the centre. 630 1 Australian Greens 160 The national decision-making body of the Australian Greens is the National Council, consisting of delegates from each member body (a state or territory Greens party) and composed of national office bearers including the National Convenor, Secretary and Treasurer. 631 1 Australian Greens 160 There is also a Public Officer, a Party Agent and a Registered Officer. 632 1 Australian Greens 160 The National Council arrives at decisions by consensus. 633 1 Australian Greens 160 All policies originating from this structure are subject to ratification by the members of the Australian Greens at National Conference. 634 1 Australian Greens 161 The various Australian states and territories have different electoral systems, all of which allow the Greens to gain representation. 635 1 Australian Greens 161 In New South Wales, Victoria, Western Australia and South Australia, the Greens hold seats in the Legislative Councils (upper houses), which are elected by proportional representation. 636 1 Australian Greens 161 The Greens also hold two seats in the unicameral Australian Capital Territory Legislative Assembly since the 2016 election, up from one after the 2012 election. 637 1 Australian Greens 161 In Queensland and the Northern Territory, their unicameral parliaments have made it difficult for the Greens to gain representation. 638 1 Australian Greens 162 The Australian Greens are a federation consisting of eight parties from each state and territory: 639 1 Australian Greens 163 The Greens' most important area of state political activity has been in Tasmania, which is the only state where the lower house of the state parliament is elected by proportional representation. 640 1 Australian Greens 163 In Tasmania, the Greens have been represented in the House of Assembly from 1983, initially as Green Independents, and from the early 1990s as an established party. 641 1 Australian Greens 163 At the 1989 state election, the Liberal Party won 17 seats to Labor's 13 and the Greens' 5. 642 1 Australian Greens 163 The Greens agreed to support a minority Labor government in exchange for a number of policy commitments. 643 1 Australian Greens 163 In 1992 the agreement broke down over the issue of employment in the forestry industry, and the premier, Michael Field, called an early state election which the Liberals won. 644 1 Australian Greens 163 Later, Labor and the Liberals combined to reduce the size of the Assembly from 35 to 25, thus raising the quota for election. 645 1 Australian Greens 163 At the 1998 election the Greens won only one seat, despite their vote only falling slightly, mainly due to the new electoral system. 646 1 Australian Greens 163 They recovered in the 2002 election when they won four seats. 647 1 Australian Greens 163 All four seats were retained in the 2006 election. 648 1 Australian Greens 163 After gaining 5 seats in the 2010 election, in April 2010 Nick McKim became the first Green Minister in Australia. 649 1 Australian Greens 164 In the 2011 New South Wales election, the Greens claimed their first lower-house seat in the district of Balmain. 650 1 Australian Greens 164 In the 2014 Victorian election, they won two lower-house seats, those of Melbourne and Prahran. 651 1 Australian Greens 165 Three Greens have become ministers at the state/territory level: Nick McKim and Cassy O'Connor in Tasmania until 2014, and Shane Rattenbury in the ACT to the present. 652 1 Australian Greens 166 A variety of working groups have been established by the National Council, which are directly accessible to all Greens members. 653 1 Australian Greens 166 Working groups perform an advisory function by developing policy, reviewing or developing the party structure, or by performing other tasks assigned by the National Council. 654 1 Australian Greens 167 The Australian Young Greens are a federation of Young Greens groups from each Australian state and territory. 655 1 Australian Greens 167 Together they form the Youth Wing of the Australian Greens 656 1 Australian Greens 168 A national Sexuality and Gender Identity Working Group existed from 2008-2012. 657 1 Australian Greens 168 It was concerned with advancing the party's position on LGBTIQ rights. 658 1 Australian Greens 168 The last National Conference agreed to start planning to revive the group. 659 1 Australian Greens 169 There are LGBTIQ working groups in some state and territory parties, including: 660 1 Australian Greens 170 Greens MPs are each assigned their own portfolios, or specific areas of responsibility. 661 1 Australian Greens 170 All portfolios are decided by the party and may differ in title from the Government's portfolio priorities - for example, the Greens have formed a 'Gun Control' portfolio, of which there is no equivalent in the Government. 662 1 Australian Greens 171 "Portfolios are divided into five major categories according to the Greens: ""An equal society"", ""world-class essential services"", ""climate and the environment"", ""the green economy"", and ""a confident Australia""." 663 1 Australian Greens 172 As of 2019, Greens MPs hold the following portfolios: 664 1 Australian Greens 173 "The Greens do not have formal links to environmental organisations commonly labelled by the media as ""green groups"" such as the Australian Conservation Foundation, The Wilderness Society and Greenpeace, all of whom claim to be non-partisan." 665 1 Australian Greens 173 "However, it is common for the media to report the activities of such groups and those of The Greens under the general category of ""greens""." 666 1 Australian Greens 173 "During elections, there is sometimes competition between The Greens and one or more of these groups negotiating ""greens preferences"" with other parties." 667 1 Australian Greens 173 The Greens preference negotiation objectives are to attempt to get Greens senators elected, and to get policy outcomes on issues like Tasmanian forests, though these objectives may be to a greater or lesser extent in conflict and the Greens more often direct preferences to Labor than the Liberals, but it is claimed that this did not affect federal election outcomes in 2001 and 2004. 668 1 Australian Greens 174 The Greens were in a formal alliance with the Australian Labor Party in the Tasmanian Parliament under the Bartlett and Giddings governments between 2010 and 2014, and signed a formal agreement with the minority Gillard Labor Government in the Federal Australian Parliament in 2010. 669 1 Australian Greens 174 "Milne declared this agreement ""effectively over"" in February 2013, but said that the Greens would continue to support Labor in the Parliament." 670 1 Australian Greens 174 Generally the Greens preference Labor ahead of the Coalition at elections. 671 1 Australian Greens 175 Many Labor supporters and trade unionists see the Greens' policies as destructive of employment in industries like mining and forestry. 672 1 Australian Greens 175 The forestry industry has been a particular target of environmental campaigns and the Forestry Division of the CFMEU have actively campaigned against the Greens. 673 1 Australian Greens 175 Left-wing trade unionists and some members of Labor's Left faction sympathise with the Greens' social policies and often identify more readily with the Greens than with the Labor Right. 674 1 Australian Greens 175 Some unionists, such as NTEU and AMWU members have run for State or Federal parliament for the Greens. 675 1 Australian Greens 175 South Australian Labor MP, Kris Hanna, defected to the Australian Greens in 2003 (before leaving the Greens in 2006, and being re-elected as an independent in the 2006 South Australian election). 676 1 Australian Greens 175 In 2008, Queensland Labor MP Ronan Lee defected to the Greens, becoming the first-ever Greens MP in the unicameral Queensland parliament. 677 1 Australian Greens 175 "He said he made the decision after the Queensland government had ""failed to act"" against climate change." 678 1 Australian Greens 175 In 2015, the Electrical Trades Union of Australia (ETU) invited federal Greens MP Adam Bandt as a speaker at the ETU National Officers' Conference in Adelaide on account of their shared opposition to the China-Australia Free Trade Agreement, which was approved by both the ALP and LNP . 679 1 Australian Greens 175 "Adam Bandt also spoke of the importance of ""transition funding"" to support workers and communities who would be affected by a transition from coal-fired power to renewable energy sources." 680 1 Australian Greens 175 The Greens also announced Jim Casey, the NSW state secretary of the Fire Brigade Employees Union, as the candidate for the 2016 federal election in Grayndler. 681 1 Australian Greens 176 However, these Green sympathies are not universal within Labor's Left and the two groups often find themselves competing in elections, making the Greens' growing popularity a threat to Labor. 682 1 Australian Greens 176 "In 2002, Labor front bencher and prominent Left member Lindsay Tanner wrote ""The emergence of the Greens... is already hurting the ALP's ability to attract new members amongst young people." 683 1 Australian Greens 176 "During the 2004 campaign, Tanner's own seat of Melbourne in Victoria was thought to be under serious threat by the Greens and he described Greens policies as ""mad""." 684 1 Australian Greens 176 In the end, Tanner held the seat comfortably on primary votes (51.78%, +4.35-point swing). 685 1 Australian Greens 176 He did not stand for election at the 2010 election and his seat was won by the Greens. 686 1 Australian Greens 177 In the 2006 Victorian state election, there was increased bitterness between Labor and the Greens. 687 1 Australian Greens 177 Labor direct-mailed a letter from Peter Garrett to voters in its threatened inner-Melbourne seats claiming that the Greens were preferencing the Liberal Party, in spite of Greens preferences being either for Labor or being open. 688 1 Australian Greens 177 "Following the election, The Age's Paul Austin wrote ""Labor's campaign manager, state secretary Stephen Newnham, reckons he knows why the Greens' support fell away in the last days of the campaign." 689 1 Australian Greens 177 "He has told cabinet and caucus members it was because of Labor's loud assertions that the Greens had done a secret preferences deal with the Liberals""." 690 1 Australian Greens 178 "In April 2007, ""The Age"" reported that the Victorian Greens had published a poem titled ""The Battle of Jeff's Shed"", by Mike Puleston, describing ALP officials and volunteers who scrutinised vote counting after the state election as ""the Labor Panzers and their hardened SS troops – SS stood for Sturm Scrutineers""." 691 1 Australian Greens 178 The poem described the final vote count at the Melbourne Exhibition Centre, which finished about 4 am on 14 December and resulted in the election of three Greens MLCs. 692 1 Australian Greens 178 Labor directed preferences in the upper house to the DLP above the Greens, which resulted in their preferences indirectly electing Peter Kavanagh from DLP in Western Victoria Region. 693 1 Australian Greens 179 Prior to the 2010 Federal Election, the Electrical Trades Union's Victorian branch donated $325,000 to the Greens' Victorian campaign – the largest political donation ever directed to the Party up to that time. 694 1 Australian Greens 180 In March 2011, division emerged within the Labor Party over Prime Minister Gillard's initial support for a Greens proposal to remove the commonwealth veto over Territory legislation. 695 1 Australian Greens 180 "Joe de Bruyn, head of the Shop, Distributors and Allied Employees Association, said ""Everybody in the federal parliament knows that this is simply a way of letting the territories into euthanasia or whatever else they want to do""." 696 1 Australian Greens 180 Anti-euthanasia Labor senators called on Gillard to overturn Labor's support for the Greens plan and press reports said some Labor senators had complained that the issue had not been discussed in Cabinet. 697 1 Australian Greens 180 Prime Minister Gillard said that no caucus members had raised concerns with her over the influence of the Greens over Labor policy. 698 1 Australian Greens 180 "Amidst suggestions that Labor was ""too close"" to the Greens, Prime Minister Gillard said in March: ""The Greens are not a party of government and have no tradition of striking the balance required to deliver major reform""." 699 1 Australian Greens 181 Relations between the Greens and the Liberal-National Coalition are generally poor and the Greens usually direct voters to preference the Labor Party ahead of the Liberals or Nationals in Australian elections. 700 1 Australian Greens 181 The Coalition has however directed strategic preferences to the Greens over Labor in the past, as in the Division of Melbourne, where Adam Bandt was elected at the 2010 Australian federal election with Liberal Preferences. 701 1 Australian Greens 181 In addition, the Tasmanian Liberal Party under Tony Rundle managed to form a minority government through an informal alliance with the Tasmanian Greens between 1996 and 1998, enacting some progressive reforms in favour of forest conservation and LGBT rights during its term. 702 1 Australian Greens 181 At the 2010 Victorian State Election, the Liberals put their preference for the Greens below the Labor Party. 703 1 Australian Greens 182 "During the 2004 federal election the Australian Greens were branded as ""environmental extremists"" and ""fascists"" by some members of the Liberal-National Coalition Government." 704 1 Australian Greens 182 "John Anderson described the Greens as 'watermelons', being ""green on the outside and red on the inside""." 705 1 Australian Greens 182 "John Howard, while Australian Prime Minister and leader of the Liberal Party, stated that ""The Greens are not just about the environment." 706 1 Australian Greens 182 "They have a whole lot of other very, very kooky policies in relation to things like drugs and all of that sort of stuff""." 707 1 Australian Greens 183 Former Federal Conservation Minister Eric Abetz criticised former Australian Greens senators Bob Brown and Kerry Nettle for spending most of their time on non-environmental issues. 708 1 Australian Greens 184 "In 2011, Liberal Shadow Cabinet frontbencher Kevin Andrews published a critique of the Greens policy agenda for Quadrant Magazine in which he wrote that the Greens' ""objective involves a radical transformation of the culture that underpins Western civilisation"" and that their agenda would threaten the ""Judeo-Christian/Enlightenment synthesis that upholds the individual"" as well as ""the economic system that has resulted in the creation of wealth and prosperity for the most people in human history." 709 1 Australian Greens 185 In December 2013, Liberal Party Treasurer Joe Hockey secured a deal with the Greens to remove the debt ceiling in response to debt approaching the current limit of $300b, despite opposition from the Labor Party. 710 1 Australian Greens 185 "In December 2015, the Greens struck a deal with the Coalition Government, passing a law requiring multinational private companies with a turnover over $200 million to disclose their tax arrangements and also making it mandatory for multinational companies with a ""global"" turnover of $1 billion or more to have to prepare ""general purpose"" financial statements, which disclose greater tax details than previously occurred in Australia." 711 1 Australian Greens 185 Once more the following year the Coalition Government and the Greens agreed on a permanent 15% tax rate for backpackers, in exchange for a $100 million funding boost to environmental stewardship not-for-profit Landcare. 712 1 Australian Greens 186 "In a similar vein to the Family First television advertisements in 2004, Country Alliance also ran television advertisements in the lead up to the 2006 Victorian state election claiming that the Greens policies were ""extreme""." 713 1 Australian Greens 187 The Greens have voiced opposition and even organised protests against the One Nation Party (an anti-immigration, economically protectionist Party which enjoyed significant publicity in the 1998 federal election). 714 1 Australian Greens 188 The Greens generally draw support from younger, wealthier voters with higher than average educational attainment. 715 1 Australian Greens 188 The electorates that delivered the Greens' best lower house results at the 2016 election were wealthy metropolitan seats such as Melbourne, Higgins and Melbourne Ports. 716 1 Australian Greens 189 The Greens absorbed much of the Democrats support base following its downfall as the third party in Australia and many of the social and environmental policies and issues the Democrats advocated for have been taken up by the Greens. 717 1 Australian Greens 189 Much like the Democrats, the Greens have a higher proportion of supporters who are university educated, under 40, who identify as professionals in their field (teachers, graphic designers, engineers, etc. 718 1 Australian Greens 189 as well as small business owners) and who earn above the national average wage. 719 1 Australian Greens 190 A study conducted by the Roy Morgan Institute in 2013 found that those classified as professionals in their field are 50% more likely to vote Greens than any other party. 720 1 Australian Greens 190 The top 10 professions to vote Greens in 2013 included: 721 1 Australian Greens 192 There is a growing support for the Greens in some regional and rural areas, particularly in the northern coastal regions of New South Wales and the Surf Coast region of Victoria, around environmental and sustainability issues due to the Greens' environmental principles, particularly their opposition to coal-seam gas mining. 722 1 Australian Greens 192 However, by and large, Greens support in the most scarcely populated rural areas tends to be lower than average. 723 1 Australian Greens 193 According to the ABC's Vote Compass, 63% of Greens voters rated the environment as the most important issue at the 2019 federal election. 724 1 Australian Greens 193 The environment was also ranked as the most important issue overall in 2019, including all other voters. 725 1 Australian Greens 195 Senators Vallentine, Chamarette and Margetts were all elected as Greens (WA) senators and served their terms before the Greens WA affiliated to the Australian Greens, meaning that they were not considered to be Australian Greens senators at the time. 726 1 Australian Greens 196 For a full list of current and former Greens members of parliament in the states and territories see:
727 1 Australian Greens 196 List of Greens MPs in 728 1 Australian Greens 197 Note that the Greens have never had any representation in the Northern Territory. 729 1 Australian Greens 199 For the 2015-2016 financial year, the top ten disclosed donors to the Greens Party were: Graeme Wood (businessman) ($600,000), Duncan Turpie ($400,000), Electrical Trades Union of Australia ($320,000), Louise Crossley ($138,000), Anna Hackett ($100,000), Pater Investments ($100,000), Ruth Greble ($35,000), Minax Uriel Ptd Ltd ($35,000) and Chilla Bulbeck ($32,000). 730 1 Australian Greens 200 "Since 2017, the Australian Greens have implemented real-time disclosure of donations to them of over $1,000, in an effort to ""clean up politics""." 731 1 Primary production 1 In ecology, primary production is the synthesis of organic compounds from atmospheric or aqueous carbon dioxide. 732 1 Primary production 1 It principally occurs through the process of photosynthesis, which uses light as its source of energy, but it also occurs through chemosynthesis, which uses the oxidation or reduction of inorganic chemical compounds as its source of energy. 733 1 Primary production 1 Almost all life on Earth relies directly or indirectly on primary production. 734 1 Primary production 1 "The organisms responsible for primary production are known as ""primary producers"" or autotrophs, and form the base of the food chain." 735 1 Primary production 1 In terrestrial ecoregions, these are mainly plants, while in aquatic ecoregions algae predominate in this role. 736 1 Primary production 1 "Ecologists distinguish primary production as either ""net"" or ""gross"", the former accounting for losses to processes such as cellular respiration, the latter not." 737 1 Primary production 2 Primary production is the production of chemical energy in organic compounds by living organisms. 738 1 Primary production 2 The main source of this energy is sunlight but a minute fraction of primary production is driven by lithotrophic organisms using the chemical energy of inorganic molecules. 739 1 Primary production 3 Regardless of its source, this energy is used to synthesize complex organic molecules from simpler inorganic compounds such as carbon dioxide (CO) and water (HO). 740 1 Primary production 3 The following two equations are simplified representations of photosynthesis (top) and (one form of) chemosynthesis (bottom): 741 1 Primary production 4 In both cases, the end point is a polymer of reduced carbohydrate, (CHO), typically molecules such as glucose or other sugars. 742 1 Primary production 4 These relatively simple molecules may be then used to further synthesise more complicated molecules, including proteins, complex carbohydrates, lipids, and nucleic acids, or be respired to perform work. 743 1 Primary production 4 Consumption of primary producers by heterotrophic organisms, such as animals, then transfers these organic molecules (and the energy stored within them) up the food web, fueling all of the Earth's living systems. 744 1 Primary production 5 Gross primary production (GPP) is the amount of chemical energy, typically expressed as carbon biomass, that primary producers create in a given length of time. 745 1 Primary production 5 "Some fraction of this fixed energy is used by primary producers for cellular respiration and maintenance of existing tissues (i.e., ""growth respiration"" and ""maintenance respiration"")." 746 1 Primary production 5 The remaining fixed energy (i.e., mass of photosynthate) is referred to as net primary production (NPP). 747 1 Primary production 6 Net primary production is the rate at which all the autotrophs in an ecosystem produce net useful chemical energy. 748 1 Primary production 6 As noted, it is equal to the difference between the rate at which the plants in an ecosystem produce useful chemical energy (GPP) and the rate at which they use some of that energy during respiration. 749 1 Primary production 6 Net primary production is available to be directed toward growth and reproduction of primary producers. 750 1 Primary production 6 As such it is available for consumption by herbivores. 751 1 Primary production 7 Both gross and net primary production are typically expressed in units of mass per unit area per unit time interval. 752 1 Primary production 7 In terrestrial ecosystems, mass of carbon per unit area per year (g C m yr) is most often used as the unit of measurement. 753 1 Primary production 7 "Note that a distinction is sometimes drawn between ""production"" and ""productivity"", with the former the quantity of material produced (g C m), the latter the rate at which it is produced (g C m yr), but these terms are more typically used interchangeably." 754 1 Primary production 8 On the land, almost all primary production is now performed by vascular plants, with a small fraction coming from algae and non-vascular plants such as mosses and liverworts. 755 1 Primary production 8 Before the evolution of vascular plants, non-vascular plants likely played a more significant role. 756 1 Primary production 8 Primary production on land is a function of many factors, but principally local hydrology and temperature (the latter covaries to an extent with light, specifically photosynthetically active radiation (PAR), the source of energy for photosynthesis). 757 1 Primary production 8 While plants cover much of the Earth's surface, they are strongly curtailed wherever temperatures are too extreme or where necessary plant resources (principally water and PAR) are limiting, such as deserts or polar regions. 758 1 Primary production 9 "Water is ""consumed"" in plants by the processes of photosynthesis (see above) and transpiration." 759 1 Primary production 9 The latter process (which is responsible for about 90% of water use) is driven by the evaporation of water from the leaves of plants. 760 1 Primary production 9 Transpiration allows plants to transport water and mineral nutrients from the soil to growth regions, and also cools the plant. 761 1 Primary production 9 Diffusion of water vapour out of a leaf, the force that drives transpiration, is regulated by structures known as stomata. 762 1 Primary production 9 These structure also regulate the diffusion of carbon dioxide from the atmosphere into the leaf, such that decreasing water loss (by partially closing stomata) also decreases carbon dioxide gain. 763 1 Primary production 9 Certain plants use alternative forms of photosynthesis, called Crassulacean acid metabolism (CAM) and C4. 764 1 Primary production 9 These employ physiological and anatomical adaptations to increase water-use efficiency and allow increased primary production to take place under conditions that would normally limit carbon fixation by C3 plants (the majority of plant species). 765 1 Primary production 10 In a reversal of the pattern on land, in the oceans, almost all photosynthesis is performed by algae, with a small fraction contributed by vascular plants and other groups. 766 1 Primary production 10 Algae encompass a diverse range of organisms, ranging from single floating cells to attached seaweeds. 767 1 Primary production 10 They include photoautotrophs from a variety of groups. 768 1 Primary production 10 Eubacteria are important photosynthetizers in both oceanic and terrestrial ecosystems, and while some archaea are phototrophic, none are known to utilise oxygen-evolving photosynthesis. 769 1 Primary production 10 A number of eukaryotes are significant contributors to primary production in the ocean, including green algae, brown algae and red algae, and a diverse group of unicellular groups. 770 1 Primary production 10 Vascular plants are also represented in the ocean by groups such as the seagrasses. 771 1 Primary production 11 Unlike terrestrial ecosystems, the majority of primary production in the ocean is performed by free-living microscopic organisms called phytoplankton. 772 1 Primary production 11 Larger autotrophs, such as the seagrasses and macroalgae (seaweeds) are generally confined to the littoral zone and adjacent shallow waters, where they can attach to the underlying substrate but still be within the photic zone. 773 1 Primary production 11 "There are exceptions, such as ""Sargassum"", but the vast majority of free-floating production takes place within microscopic organisms." 774 1 Primary production 12 The factors limiting primary production in the ocean are also very different from those on land. 775 1 Primary production 12 The availability of water, obviously, is not an issue (though its salinity can be). 776 1 Primary production 12 Similarly, temperature, while affecting metabolic rates (see Q), ranges less widely in the ocean than on land because the heat capacity of seawater buffers temperature changes, and the formation of sea ice insulates it at lower temperatures. 777 1 Primary production 12 However, the availability of light, the source of energy for photosynthesis, and mineral nutrients, the building blocks for new growth, play crucial roles in regulating primary production in the ocean. 778 1 Primary production 12 Available Earth System Models suggest that ongoing ocean bio-geochemical changes could trigger reductions in ocean NPP between 3% and 10% of current values depending on the emissions scenario. 779 1 Primary production 13 The sunlit zone of the ocean is called the photic zone (or euphotic zone). 780 1 Primary production 13 This is a relatively thin layer (10–100 m) near the ocean's surface where there is sufficient light for photosynthesis to occur. 781 1 Primary production 13 For practical purposes, the thickness of the photic zone is typically defined by the depth at which light reaches 1% of its surface value. 782 1 Primary production 13 Light is attenuated down the water column by its absorption or scattering by the water itself, and by dissolved or particulate material within it (including phytoplankton). 783 1 Primary production 14 Net photosynthesis in the water column is determined by the interaction between the photic zone and the mixed layer. 784 1 Primary production 14 Turbulent mixing by wind energy at the ocean's surface homogenises the water column vertically until the turbulence dissipates (creating the aforementioned mixed layer). 785 1 Primary production 14 The deeper the mixed layer, the lower the average amount of light intercepted by phytoplankton within it. 786 1 Primary production 14 The mixed layer can vary from being shallower than the photic zone, to being much deeper than the photic zone. 787 1 Primary production 14 When it is much deeper than the photic zone, this results in phytoplankton spending too much time in the dark for net growth to occur. 788 1 Primary production 14 The maximum depth of the mixed layer in which net growth can occur is called the critical depth. 789 1 Primary production 14 As long as there are adequate nutrients available, net primary production occurs whenever the mixed layer is shallower than the critical depth. 790 1 Primary production 15 Both the magnitude of wind mixing and the availability of light at the ocean's surface are affected across a range of space- and time-scales. 791 1 Primary production 15 The most characteristic of these is the seasonal cycle (caused by the consequences of the Earth's axial tilt), although wind magnitudes additionally have strong spatial components. 792 1 Primary production 15 Consequently, primary production in temperate regions such as the North Atlantic is highly seasonal, varying with both incident light at the water's surface (reduced in winter) and the degree of mixing (increased in winter). 793 1 Primary production 15 In tropical regions, such as the gyres in the middle of the major basins, light may only vary slightly across the year, and mixing may only occur episodically, such as during large storms or hurricanes. 794 1 Primary production 16 Mixing also plays an important role in the limitation of primary production by nutrients. 795 1 Primary production 16 Inorganic nutrients, such as nitrate, phosphate and silicic acid are necessary for phytoplankton to synthesise their cells and cellular machinery. 796 1 Primary production 16 Because of gravitational sinking of particulate material (such as plankton, dead or fecal material), nutrients are constantly lost from the photic zone, and are only replenished by mixing or upwelling of deeper water. 797 1 Primary production 16 This is exacerbated where summertime solar heating and reduced winds increases vertical stratification and leads to a strong thermocline, since this makes it more difficult for wind mixing to entrain deeper water. 798 1 Primary production 16 Consequently, between mixing events, primary production (and the resulting processes that leads to sinking particulate material) constantly acts to consume nutrients in the mixed layer, and in many regions this leads to nutrient exhaustion and decreased mixed layer production in the summer (even in the presence of abundant light). 799 1 Primary production 16 However, as long as the photic zone is deep enough, primary production may continue below the mixed layer where light-limited growth rates mean that nutrients are often more abundant. 800 1 Primary production 17 Another factor relatively recently discovered to play a significant role in oceanic primary production is the micronutrient iron. 801 1 Primary production 17 This is used as a cofactor in enzymes involved in processes such as nitrate reduction and nitrogen fixation. 802 1 Primary production 17 A major source of iron to the oceans is dust from the Earth's deserts, picked up and delivered by the wind as aeolian dust. 803 1 Primary production 18 In regions of the ocean that are distant from deserts or that are not reached by dust-carrying winds (for example, the Southern and North Pacific oceans), the lack of iron can severely limit the amount of primary production that can occur. 804 1 Primary production 18 These areas are sometimes known as HNLC (High-Nutrient, Low-Chlorophyll) regions, because the scarcity of iron both limits phytoplankton growth and leaves a surplus of other nutrients. 805 1 Primary production 18 Some scientists have suggested introducing iron to these areas as a means of increasing primary productivity and sequestering carbon dioxide from the atmosphere. 806 1 Primary production 19 The methods for measurement of primary production vary depending on whether gross vs net production is the desired measure, and whether terrestrial or aquatic systems are the focus. 807 1 Primary production 19 Gross production is almost always harder to measure than net, because of respiration, which is a continuous and ongoing process that consumes some of the products of primary production (i.e. 808 1 Primary production 19 sugars) before they can be accurately measured. 809 1 Primary production 19 Also, terrestrial ecosystems are generally more difficult because a substantial proportion of total productivity is shunted to below-ground organs and tissues, where it is logistically difficult to measure. 810 1 Primary production 19 Shallow water aquatic systems can also face this problem. 811 1 Primary production 20 Scale also greatly affects measurement techniques. 812 1 Primary production 20 The rate of carbon assimilation in plant tissues, organs, whole plants, or plankton samples can be quantified by biochemically based techniques, but these techniques are decidedly inappropriate for large scale terrestrial field situations. 813 1 Primary production 20 There, net primary production is almost always the desired variable, and estimation techniques involve various methods of estimating dry-weight biomass changes over time. 814 1 Primary production 20 Biomass estimates are often converted to an energy measure, such as kilocalories, by an empirically determined conversion factor. 815 1 Primary production 21 In terrestrial ecosystems, researchers generally measure net primary production (NPP). 816 1 Primary production 21 Although its definition is straightforward, field measurements used to estimate productivity vary according to investigator and biome. 817 1 Primary production 21 Field estimates rarely account for below ground productivity, herbivory, turnover, litterfall, volatile organic compounds, root exudates, and allocation to symbiotic microorganisms. 818 1 Primary production 21 Biomass based NPP estimates result in underestimation of NPP due to incomplete accounting of these components. 819 1 Primary production 21 However, many field measurements correlate well to NPP. 820 1 Primary production 21 There are a number of comprehensive reviews of the field methods used to estimate NPP. 821 1 Primary production 21 Estimates of ecosystem respiration, the total carbon dioxide produced by the ecosystem, can also be made with gas flux measurements. 822 1 Primary production 22 The major unaccounted pool is belowground productivity, especially production and turnover of roots. 823 1 Primary production 22 Belowground components of NPP are difficult to measure. 824 1 Primary production 22 BNPP (below-ground NPP) is often estimated based on a ratio of ANPP:BNPP (above-ground NPP:below-ground NPP) rather than direct measurements. 825 1 Primary production 23 Gross primary production can be estimated from measurements of net ecosystem exchange (NEE) of carbon dioxide made by the eddy covariance technique. 826 1 Primary production 23 During night, this technique measures all components of ecosystem respiration. 827 1 Primary production 23 This respiration is scaled to day-time values and further subtracted from NEE. 828 1 Primary production 24 Most frequently, peak standing biomass is assumed to measure NPP. 829 1 Primary production 24 In systems with persistent standing litter, live biomass is commonly reported. 830 1 Primary production 24 Measures of peak biomass are more reliable if the system is predominantly annuals. 831 1 Primary production 24 However, perennial measurements could be reliable if there were a synchronous phenology driven by a strong seasonal climate. 832 1 Primary production 24 These methods may underestimate ANPP in grasslands by as much as 2 (temperate) to 4 (tropical) fold. 833 1 Primary production 24 Repeated measures of standing live and dead biomass provide more accurate estimates of all grasslands, particularly those with large turnover, rapid decomposition, and interspecific variation in timing of peak biomass. 834 1 Primary production 24 Wetland productivity (marshes and fens) is similarly measured. 835 1 Primary production 24 In Europe, annual mowing makes the annual biomass increment of wetlands evident. 836 1 Primary production 25 Methods used to measure forest productivity are more diverse than those of grasslands. 837 1 Primary production 25 Biomass increment based on stand specific allometry plus litterfall is considered a suitable although incomplete accounting of above-ground net primary production (ANPP). 838 1 Primary production 25 Field measurements used as a proxy for ANPP include annual litterfall, diameter or basal area increment (DBH or BAI), and volume increment. 839 1 Primary production 26 In aquatic systems, primary production is typically measured using one of six main techniques: 840 1 Primary production 27 The technique developed by Gaarder and Gran uses variations in the concentration of oxygen under different experimental conditions to infer gross primary production. 841 1 Primary production 27 Typically, three identical transparent vessels are filled with sample water and stoppered. 842 1 Primary production 27 The first is analysed immediately and used to determine the initial oxygen concentration; usually this is done by performing a Winkler titration. 843 1 Primary production 27 The other two vessels are incubated, one each in under light and darkened. 844 1 Primary production 27 After a fixed period of time, the experiment ends, and the oxygen concentration in both vessels is measured. 845 1 Primary production 27 As photosynthesis has not taken place in the dark vessel, it provides a measure of ecosystem respiration. 846 1 Primary production 27 The light vessel permits both photosynthesis and respiration, so provides a measure of net photosynthesis (i.e. 847 1 Primary production 27 oxygen production via photosynthesis subtract oxygen consumption by respiration). 848 1 Primary production 27 Gross primary production is then obtained by adding oxygen consumption in the dark vessel to net oxygen production in the light vessel. 849 1 Primary production 28 The technique of using C incorporation (added as labelled NaCO) to infer primary production is most commonly used today because it is sensitive, and can be used in all ocean environments. 850 1 Primary production 28 As C is radioactive (via beta decay), it is relatively straightforward to measure its incorporation in organic material using devices such as scintillation counters. 851 1 Primary production 29 Depending upon the incubation time chosen, net or gross primary production can be estimated. 852 1 Primary production 29 Gross primary production is best estimated using relatively short incubation times (1 hour or less), since the loss of incorporated C (by respiration and organic material excretion / exudation) will be more limited. 853 1 Primary production 29 Net primary production is the fraction of gross production remaining after these loss processes have consumed some of the fixed carbon. 854 1 Primary production 30 Loss processes can range between 10-60% of incorporated C according to the incubation period, ambient environmental conditions (especially temperature) and the experimental species used. 855 1 Primary production 30 Aside from those caused by the physiology of the experimental subject itself, potential losses due to the activity of consumers also need to be considered. 856 1 Primary production 30 This is particularly true in experiments making use of natural assemblages of microscopic autotrophs, where it is not possible to isolate them from their consumers. 857 1 Primary production 31 The methods based on stable isotopes and O/Ar ratios have the advantage of providing estimates of respiration rates in the light without the need of incubations in the dark. 858 1 Primary production 31 Among them, the method of the triple oxygen isotopes and O/Ar have the additional advantage of not needing incubations in closed containers and O/Ar can even be measured continuously at sea using equilibrator inlet mass spectrometry (EIMS) or a membrane inlet mass spectrometry (MIMS). 859 1 Primary production 31 However, if results relevant to the carbon cycle are desired, it is probably better to rely on methods based on carbon (and not oxygen) isotopes. 860 1 Primary production 31 It is important to notice that the method based on carbon stable isotopes is not simply an adaptation of the classic C method, but an entirely different approach that does not suffer from the problem of lack of account of carbon recycling during photosynthesis. 861 1 Primary production 32 As primary production in the biosphere is an important part of the carbon cycle, estimating it at the global scale is important in Earth system science. 862 1 Primary production 32 However, quantifying primary production at this scale is difficult because of the range of habitats on Earth, and because of the impact of weather events (availability of sunlight, water) on its variability. 863 1 Primary production 32 Using satellite-derived estimates of the Normalized Difference Vegetation Index (NDVI) for terrestrial habitats and sea-surface chlorophyll for the oceans, it is estimated that the total (photoautotrophic) primary production for the Earth was 104.9 petagrams of carbon per year (Pg C yr; equivalent to the non-SI Gt C yr). 864 1 Primary production 32 Of this, 56.4 Pg C yr (53.8%), was the product of terrestrial organisms, while the remaining 48.5 Pg C yr, was accounted for by oceanic production. 865 1 Primary production 33 Scaling ecosystem-level GPP estimations based on eddy covariance measurements of net ecosystem exchange (see above) to regional and global values using spatial details of different predictor variables, such as climate variables and remotely sensed fAPAR or LAI led to a terrestrial gross primary production of 123±8 Gt carbon (NOT carbon dioxide) per year during 1998-2005 866 1 Primary production 34 In areal terms, it was estimated that land production was approximately 426 g C m yr (excluding areas with permanent ice cover), while that for the oceans was 140 g C m yr. Another significant difference between the land and the oceans lies in their standing stocks - while accounting for almost half of total production, oceanic autotrophs only account for about 0.2% of the total biomass. 867 1 Primary production 35 Primary productivity can be estimated by a variety of proxies. 868 1 Primary production 35 One that has particular relevance to the geological record is Barium, whose concentration in marine sediments rises in line with primary productivity at the surface. 869 1 Primary production 36 Human societies are part of the Earth's NPP cycle, but exert a disproportionate influence in it. 870 1 Primary production 36 "In 1996, Josep Garí designed a new indicator of sustainable development based precisely on the estimation of the human appropriation of NPP: he coined it ""HANPP"" (Human Appropriation of Net Primary Production) and introduced it at the inaugural conference of the European Society for Ecological Economics." 871 1 Primary production 36 HANPP has since been further developed and widely applied in research on ecological economics as well as in policy analysis for sustainability. 872 1 Primary production 36 HANPP represents a proxy of the human impact on Nature and can be applied to different geographical scales and also globally. 873 1 Primary production 37 "The extensive degree of human use of the Planet's resources, mostly via land use, results in various levels of impact on ""actual NPP"" (NPP)." 874 1 Primary production 37 "Although in some regions, such as the Nile valley, irrigation has resulted in a considerable increase in primary production, in most of the Planet there is a notable trend of ""NPP reduction due to land changes"" (ΔNPP) of 9.6% across global land-mass." 875 1 Primary production 37 "In addition to this, end consumption by people raises the total HANPP to 23.8% of ""potential vegetation"" (NPP)." 876 1 Primary production 37 It is estimated that, in 2000, 34% of the Earth's ice-free land area (12% cropland; 22% pasture) was devoted to human agriculture. 877 1 Primary production 37 This disproportionate amount reduces the energy available to other species, having a marked impact on biodiversity, flows of carbon, water and energy, and ecosystem services, and scientists have questioned how large this fraction can be before these services begin to break down. 878 1 Primary production 37 Reductions in NPP are also expected in the ocean as a result of ongoing climate change, potentially impacting marine ecosystems and goods and services that the oceans provide 879 1 Wind turbine 1 A wind turbine, or alternatively referred to as a wind energy converter, is a device that converts the wind's kinetic energy into electrical energy. 880 1 Wind turbine 2 Wind turbines are manufactured in a wide range of vertical and horizontal axis. 881 1 Wind turbine 2 The smallest turbines are used for applications such as battery charging for auxiliary power for boats or caravans or to power traffic warning signs. 882 1 Wind turbine 2 Larger turbines can be used for making contributions to a domestic power supply while selling unused power back to the utility supplier via the electrical grid. 883 1 Wind turbine 2 Arrays of large turbines, known as wind farms, are becoming an increasingly important source of intermittent renewable energy and are used by many countries as part of a strategy to reduce their reliance on fossil fuels. 884 1 Wind turbine 2 "One assessment claimed that, , wind had the ""lowest relative greenhouse gas emissions, the least water consumption demands and... the most favourable social impacts"" compared to photovoltaic, hydro, geothermal, coal and gas." 885 1 Wind turbine 3 The windwheel of Hero of Alexandria (10 AD – 70 AD) marks one of the first recorded instances of wind powering a machine in history. 886 1 Wind turbine 3 However, the first known practical wind power plants were built in Sistan, an Eastern province of Persia (now Iran), from the 7th century. 887 1 Wind turbine 3 "These ""Panemone"" were vertical axle windmills, which had long vertical drive shafts with rectangular blades." 888 1 Wind turbine 3 Made of six to twelve sails covered in reed matting or cloth material, these windmills were used to grind grain or draw up water, and were used in the gristmilling and sugarcane industries. 889 1 Wind turbine 4 Wind power first appeared in Europe during the Middle Ages. 890 1 Wind turbine 4 The first historical records of their use in England date to the 11th or 12th centuries and there are reports of German crusaders taking their windmill-making skills to Syria around 1190. 891 1 Wind turbine 4 By the 14th century, Dutch windmills were in use to drain areas of the Rhine delta. 892 1 Wind turbine 4 Advanced wind turbines were described by Croatian inventor Fausto Veranzio. 893 1 Wind turbine 4 In his book Machinae Novae (1595) he described vertical axis wind turbines with curved or V-shaped blades. 894 1 Wind turbine 5 The first electricity-generating wind turbine was a battery charging machine installed in July 1887 by Scottish academic James Blyth to light his holiday home in Marykirk, Scotland. 895 1 Wind turbine 5 Some months later American inventor Charles F. Brush was able to build the first automatically operated wind turbine after consulting local University professors and colleagues Jacob S. Gibbs and Brinsley Coleberd and successfully getting the blueprints peer-reviewed for electricity production in Cleveland, Ohio. 896 1 Wind turbine 5 Although Blyth's turbine was considered uneconomical in the United Kingdom, electricity generation by wind turbines was more cost effective in countries with widely scattered populations. 897 1 Wind turbine 6 In Denmark by 1900, there were about 2500 windmills for mechanical loads such as pumps and mills, producing an estimated combined peak power of about 30 MW. 898 1 Wind turbine 6 The largest machines were on towers with four-bladed diameter rotors. 899 1 Wind turbine 6 By 1908, there were 72 wind-driven electric generators operating in the United States from 5 kW to 25 kW. 900 1 Wind turbine 6 Around the time of World War I, American windmill makers were producing 100,000 farm windmills each year, mostly for water-pumping. 901 1 Wind turbine 7 By the 1930s, wind generators for electricity were common on farms, mostly in the United States where distribution systems had not yet been installed. 902 1 Wind turbine 7 In this period, high-tensile steel was cheap, and the generators were placed atop prefabricated open steel lattice towers. 903 1 Wind turbine 8 A forerunner of modern horizontal-axis wind generators was in service at Yalta, USSR in 1931. 904 1 Wind turbine 8 This was a 100 kW generator on a tower, connected to the local 6.3 kV distribution system. 905 1 Wind turbine 8 It was reported to have an annual capacity factor of 32 percent, not much different from current wind machines. 906 1 Wind turbine 9 In the autumn of 1941, the first megawatt-class wind turbine was synchronized to a utility grid in Vermont. 907 1 Wind turbine 9 The Smith–Putnam wind turbine only ran for 1,100 hours before suffering a critical failure. 908 1 Wind turbine 9 The unit was not repaired, because of a shortage of materials during the war. 909 1 Wind turbine 10 The first utility grid-connected wind turbine to operate in the UK was built by John Brown & Company in 1951 in the Orkney Islands. 910 1 Wind turbine 11 Despite these diverse developments, developments in fossil fuel systems almost entirely eliminated any wind turbine systems larger than supermicro size. 911 1 Wind turbine 11 In the early 1970s, however, anti-nuclear protests in Denmark spurred artisan mechanics to develop microturbines of 22 kW. 912 1 Wind turbine 11 Organizing owners into associations and co-operatives lead to the lobbying of the government and utilities and provided incentives for larger turbines throughout the 1980s and later. 913 1 Wind turbine 11 Local activists in Germany, nascent turbine manufacturers in Spain, and large investors in the United States in the early 1990s then lobbied for policies that stimulated the industry in those countries. 914 1 Wind turbine 12 It has been argued that expanding use of wind power will lead to increasing geopolitical competition over critical materials for wind turbines such as rare earth elements neodymium, praseodymium, and dysprosium. 915 1 Wind turbine 12 But this perspective has been criticised for failing to recognise that most wind turbines do not use permanent magnets and for underestimating the power of economic incentives for expanded production of these minerals. 916 1 Wind turbine 13 Wind Power Density (WPD) is a quantitative measure of wind energy available at any location. 917 1 Wind turbine 13 It is the mean annual power available per square meter of swept area of a turbine, and is calculated for different heights above ground. 918 1 Wind turbine 13 Calculation of wind power density includes the effect of wind velocity and air density. 919 1 Wind turbine 14 Wind turbines are classified by the wind speed they are designed for, from class I to class III, with A to C referring to the turbulence intensity of the wind. 920 1 Wind turbine 15 Conservation of mass requires that the amount of air entering and exiting a turbine must be equal. 921 1 Wind turbine 15 Accordingly, Betz's law gives the maximal achievable extraction of wind power by a wind turbine as 16/27 (59.3%) of the total kinetic energy of the air flowing through the turbine. 922 1 Wind turbine 16 The maximum theoretical power output of a wind machine is thus 16/27 times the kinetic energy of the air passing through the effective disk area of the machine. 923 1 Wind turbine 16 If the effective area of the disk is A, and the wind velocity v, the maximum theoretical power output P is: 924 1 Wind turbine 17 "where ""ρ"" is the air density." 925 1 Wind turbine 18 Wind-to-rotor efficiency (including rotor blade friction and drag) are among the factors affecting the final price of wind power. 926 1 Wind turbine 18 Further inefficiencies, such as gearbox losses, generator and converter losses, reduce the power delivered by a wind turbine. 927 1 Wind turbine 18 To protect components from undue wear, extracted power is held constant above the rated operating speed as theoretical power increases at the cube of wind speed, further reducing theoretical efficiency. 928 1 Wind turbine 18 In 2001, commercial utility-connected turbines delivered 75% to 80% of the Betz limit of power extractable from the wind, at rated operating speed. 929 1 Wind turbine 19 Efficiency can decrease slightly over time, one of the main reasons being dust and insect carcasses on the blades which alters the aerodynamic profile and essentially reduces the lift to drag ratio of the airfoil. 930 1 Wind turbine 19 Analysis of 3128 wind turbines older than 10 years in Denmark showed that half of the turbines had no decrease, while the other half saw a production decrease of 1.2% per year. 931 1 Wind turbine 19 Ice accretion on turbine blades has also been found to greatly reduce the efficiency of wind turbines, which is a common challenge in cold climates where in-cloud icing and freezing rain events occur. 932 1 Wind turbine 19 Vertical turbine designs have much lower efficiency than standard horizontal designs. 933 1 Wind turbine 20 In general, more stable and constant weather conditions (most notably wind speed) result in an average of 15% greater efficiency than that of a wind turbine in unstable weather conditions, thus allowing up to a 7% increase in wind speed under stable conditions. 934 1 Wind turbine 20 This is due to a faster recovery wake and greater flow entrainment that occur in conditions of higher atmospheric stability. 935 1 Wind turbine 20 However, wind turbine wakes have been found to recover faster under unstable atmospheric conditions as opposed to a stable environment. 936 1 Wind turbine 21 Different materials have been found to have varying effects on the efficiency of wind turbines. 937 1 Wind turbine 21 In an Ege University experiment, three wind turbines (Each with three blades with diameters of one meter) were constructed with blades made of different materials: A glass and glass/carbon epoxy, glass/carbon, and glass/polyester. 938 1 Wind turbine 21 When tested, the results showed that the materials with higher overall masses had a greater friction moment and thus a lower power coefficient. 939 1 Wind turbine 22 Wind turbines can rotate about either a horizontal or a vertical axis, the former being both older and more common. 940 1 Wind turbine 22 They can also include blades, or be bladeless. 941 1 Wind turbine 22 Vertical designs produce less power and are less common. 942 1 Wind turbine 23 Large three-bladed horizontal-axis wind turbines (HAWT) with the blades upwind of the tower produce the overwhelming majority of wind power in the world today. 943 1 Wind turbine 23 These turbines have the main rotor shaft and electrical generator at the top of a tower, and must be pointed into the wind. 944 1 Wind turbine 23 Small turbines are pointed by a simple wind vane, while large turbines generally use a wind sensor coupled with a yaw system. 945 1 Wind turbine 23 Most have a gearbox, which turns the slow rotation of the blades into a quicker rotation that is more suitable to drive an electrical generator. 946 1 Wind turbine 23 Some turbines use a different type of generator suited to slower rotational speed input. 947 1 Wind turbine 23 These don't need a gearbox and are called direct-drive, meaning they couple the rotor directly to the generator with no gearbox in between. 948 1 Wind turbine 23 "While permanent magnet direct-drive generators can be more costly due to the rare earth materials required, these gearless turbines are sometimes preferred over gearbox generators because they ""eliminate the gear-speed increaser, which is susceptible to significant accumulated fatigue torque loading, related reliability issues, and maintenance costs." 949 1 Wind turbine 23 There is also the pseudo direct drive mechanism, which has some advantages over the permanent magnet direct drive mechanism. 950 1 Wind turbine 23 Most horizontal axis turbines have their rotors upwind of the supporting tower. 951 1 Wind turbine 23 Downwind machines have been built, because they don't need an additional mechanism for keeping them in line with the wind. 952 1 Wind turbine 23 In high winds, the blades can also be allowed to bend, which reduces their swept area and thus their wind resistance. 953 1 Wind turbine 23 Despite these advantages, upwind designs are preferred, because the change in loading from the wind as each blade passes behind the supporting tower can cause damage to the turbine. 954 1 Wind turbine 24 Turbines used in wind farms for commercial production of electric power are usually three-bladed. 955 1 Wind turbine 24 These have low torque ripple, which contributes to good reliability. 956 1 Wind turbine 24 The blades are usually colored white for daytime visibility by aircraft and range in length from . 957 1 Wind turbine 24 The size and height of turbines increase year by year. 958 1 Wind turbine 24 Offshore wind turbines are built up to 8 MW today and have a blade length up to . 959 1 Wind turbine 24 Designs with 10 to 12 MW are in preparation. 960 1 Wind turbine 24 Usual multi megawatt turbines have tubular steel towers with a height of 70m to 120m and in extremes up to 160m. 961 1 Wind turbine 25 Vertical-axis wind turbines (or VAWTs) have the main rotor shaft arranged vertically. 962 1 Wind turbine 25 One advantage of this arrangement is that the turbine does not need to be pointed into the wind to be effective, which is an advantage on a site where the wind direction is highly variable. 963 1 Wind turbine 25 It is also an advantage when the turbine is integrated into a building because it is inherently less steerable. 964 1 Wind turbine 25 Also, the generator and gearbox can be placed near the ground, using a direct drive from the rotor assembly to the ground-based gearbox, improving accessibility for maintenance. 965 1 Wind turbine 25 However, these designs produce much less energy averaged over time, which is a major drawback. 966 1 Wind turbine 26 The key disadvantages include the relatively low rotational speed with the consequential higher torque and hence higher cost of the drive train, the inherently lower power coefficient, the 360-degree rotation of the aerofoil within the wind flow during each cycle and hence the highly dynamic loading on the blade, the pulsating torque generated by some rotor designs on the drive train, and the difficulty of modelling the wind flow accurately and hence the challenges of analysing and designing the rotor prior to fabricating a prototype. 967 1 Wind turbine 27 When a turbine is mounted on a rooftop the building generally redirects wind over the roof and this can double the wind speed at the turbine. 968 1 Wind turbine 27 If the height of a rooftop mounted turbine tower is approximately 50% of the building height it is near the optimum for maximum wind energy and minimum wind turbulence. 969 1 Wind turbine 27 While wind speeds within the built environment are generally much lower than at exposed rural sites, noise may be a concern and an existing structure may not adequately resist the additional stress. 970 1 Wind turbine 28 Subtypes of the vertical axis design include: 971 1 Wind turbine 29 "Eggbeater"" turbines, or Darrieus turbines, were named after the French inventor, Georges Darrieus." 972 1 Wind turbine 29 They have good efficiency, but produce large torque ripple and cyclical stress on the tower, which contributes to poor reliability. 973 1 Wind turbine 29 They also generally require some external power source, or an additional Savonius rotor to start turning, because the starting torque is very low. 974 1 Wind turbine 29 The torque ripple is reduced by using three or more blades, which results in greater solidity of the rotor. 975 1 Wind turbine 29 Solidity is measured by blade area divided by the rotor area. 976 1 Wind turbine 29 Newer Darrieus type turbines are not held up by guy-wires but have an external superstructure connected to the top bearing. 977 1 Wind turbine 30 A subtype of Darrieus turbine with straight, as opposed to curved, blades. 978 1 Wind turbine 30 The cycloturbine variety has variable pitch to reduce the torque pulsation and is self-starting. 979 1 Wind turbine 30 The advantages of variable pitch are: high starting torque; a wide, relatively flat torque curve; a higher coefficient of performance; more efficient operation in turbulent winds; and a lower blade speed ratio which lowers blade bending stresses. 980 1 Wind turbine 30 Straight, V, or curved blades may be used. 981 1 Wind turbine 31 "These are drag-type devices with two (or more) scoops that are used in anemometers, ""Flettner"" vents (commonly seen on bus and van roofs), and in some high-reliability low-efficiency power turbines." 982 1 Wind turbine 31 They are always self-starting if there are at least three scoops. 983 1 Wind turbine 32 Twisted Savonius is a modified savonius, with long helical scoops to provide smooth torque. 984 1 Wind turbine 32 This is often used as a rooftop wind turbine and has even been adapted for ships. 985 1 Wind turbine 33 The parallel turbine is similar to the crossflow fan or centrifugal fan. 986 1 Wind turbine 33 It uses the ground effect. 987 1 Wind turbine 33 Vertical axis turbines of this type have been tried for many years: a unit producing 10 kW was built by Israeli wind pioneer Bruce Brill in the 1980s. 988 1 Wind turbine 34 Wind turbine design is a careful balance of cost, energy output, and fatigue life. 989 1 Wind turbine 34 These factors are balanced using a range of computer modelling techniques. 990 1 Wind turbine 35 Wind turbines convert wind energy to electrical energy for distribution. 991 1 Wind turbine 35 Conventional horizontal axis turbines can be divided into three components: 992 1 Wind turbine 36 A 1.5 (MW) wind turbine of a type frequently seen in the United States has a tower high. 993 1 Wind turbine 36 The rotor assembly (blades and hub) weighs . 994 1 Wind turbine 36 The nacelle, which contains the generator, weighs . 995 1 Wind turbine 36 The concrete base for the tower is constructed using reinforcing steel and contains of concrete. 996 1 Wind turbine 36 The base is in diameter and thick near the center. 997 1 Wind turbine 37 Due to data transmission problems, structural health monitoring of wind turbines is usually performed using several accelerometers and strain gages attached to the nacelle to monitor the gearbox and equipment. 998 1 Wind turbine 37 Currently, digital image correlation and stereophotogrammetry are used to measure dynamics of wind turbine blades. 999 1 Wind turbine 37 These methods usually measure displacement and strain to identify location of defects. 1000 1 Wind turbine 37 Dynamic characteristics of non-rotating wind turbines have been measured using digital image correlation and photogrammetry. 1001 1 Wind turbine 37 Three dimensional point tracking has also been used to measure rotating dynamics of wind turbines. 1002 1 Wind turbine 38 Wind turbine rotor blades are being made longer to increase efficiency. 1003 1 Wind turbine 38 This requires them to be stiff, strong, light and resistant to fatigue. 1004 1 Wind turbine 38 Materials with these properties are composites such as polyester and epoxy, while glass fiber and carbon fiber have been used for the reinforcing. 1005 1 Wind turbine 38 Construction may use manual layup or injection molding. 1006 1 Wind turbine 39 Companies seek ways to draw greater efficiency from their designs. 1007 1 Wind turbine 39 A predominant way has been to increase blade length and thus rotor diameter. 1008 1 Wind turbine 39 Retrofitting existing turbines with larger blades reduces the work and risks of redesigning the system. 1009 1 Wind turbine 39 The current longest blade is 88.4 m (from LM Wind Power), but by 2021 offshore turbines are expected to be 10-MW with 100 m blades. 1010 1 Wind turbine 39 Longer blades need to be stiffer to avoid deflection, which requires materials with higher stiffness-to-weight ratio. 1011 1 Wind turbine 39 Because the blades need to function over a 100 million load cycles over a period of 20–25 years, the fatigue of the blade materials is also critical. 1012 1 Wind turbine 40 Materials commonly used in wind turbine blades are described below. 1013 1 Wind turbine 41 The stiffness of composites is determined by the stiffness of fibers and their volume content. 1014 1 Wind turbine 41 Typically, E-glass fibers are used as main reinforcement in the composites. 1015 1 Wind turbine 41 Typically, the glass/epoxy composites for wind turbine blades contain up to 75% glass by weight. 1016 1 Wind turbine 41 This increases the stiffness, tensile and compression strength. 1017 1 Wind turbine 41 A promising composite material is glass fiber with modified compositions like S-glass, R-glass etc. 1018 1 Wind turbine 41 Other glass fibers developed by Owens Corning are ECRGLAS, Advantex and WindStrand. 1019 1 Wind turbine 42 Carbon fiber has more tensile strength, higher stiffness and lower density than glass fiber. 1020 1 Wind turbine 42 An ideal candidate for these properties is the spar cap, a structural element of a blade which experiences high tensile loading. 1021 1 Wind turbine 42 A 100-m glass fiber blade could weigh up to 50 metric tons, while using carbon fiber in the spar saves 20% to 30% weight, about 15 metric tons. 1022 1 Wind turbine 42 However, because carbon fiber is ten times more expensive, glass fiber is still dominant. 1023 1 Wind turbine 43 Instead of making wind turbine blade reinforcements from pure glass or pure carbon, hybrid designs trade weight for cost. 1024 1 Wind turbine 43 For example for an 8 m blade, a full replacement by carbon fiber would save 80% of weight but increase costs by 150%, while a 30% replacement would save 50% of weight and increase costs by 90%. 1025 1 Wind turbine 43 Hybrid reinforcement materials include E-glass/carbon, E-glass/aramid. 1026 1 Wind turbine 43 The current longest blade by LM Wind Power is made of carbon/glass hybrid composites. 1027 1 Wind turbine 43 More research is needed about the optimal composition of materials 1028 1 Wind turbine 44 Additions of small amount (0.5 weight %) of nanoreinforcement (carbon nanotubes or nanoclay) in the polymer matrix of composites, fiber sizing or interlaminar layers can improve fatigue resistance, shear or compressive strength, and fracture toughness of the composites by 30% to 80%. 1029 1 Wind turbine 44 Research has also shown that incorporating small amounts of carbon nanotubes (CNT) can increase the lifetime up to 1500%. 1030 1 Wind turbine 45 , a wind turbine may cost around $1 million per megawatt. 1031 1 Wind turbine 46 For the wind turbine blades, while the material cost is much higher for hybrid glass/carbon fiber blades than all-glass fiber blades, labor costs can be lower. 1032 1 Wind turbine 46 Using carbon fiber allows simpler designs that use less raw material. 1033 1 Wind turbine 46 The chief manufacturing process in blade fabrication is the layering of plies. 1034 1 Wind turbine 46 Thinner blades allow reducing the number of layers and so the labor, and in some cases, equate to the cost of labor for glass fiber blades. 1035 1 Wind turbine 47 Wind turbine parts other than the rotor blades (including the rotor hub, gearbox, frame, and tower) are largely made of steel. 1036 1 Wind turbine 47 Smaller turbines (as well as megawatt-scale Enercon turbines) have begun using aluminum alloys for these components to make turbines lighter and more efficient. 1037 1 Wind turbine 47 This trend may grow if fatigue and strength properties can be improved. 1038 1 Wind turbine 47 Pre-stressed concrete has been increasingly used for the material of the tower, but still requires much reinforcing steel to meet the strength requirement of the turbine. 1039 1 Wind turbine 47 Additionally, step-up gearboxes are being increasingly replaced with variable speed generators, which requires magnetic materials. 1040 1 Wind turbine 47 In particular, this would require an greater supply of the rare earth metal neodymium. 1041 1 Wind turbine 48 Modern turbines use a couple of tons of copper for generators, cables and such. 1042 1 Wind turbine 48 , global production of wind turbines use 450,000 tonnes of copper per year. 1043 1 Wind turbine 49 A study of the material consumption trends and requirements for wind energy in Europe found that bigger turbines have a higher consumption of precious metals but lower material input per kW generated. 1044 1 Wind turbine 49 The current material consumption and stock was compared to input materials for various onshore system sizes. 1045 1 Wind turbine 49 In all EU countries the estimates for 2020 doubled the values consumed in 2009. 1046 1 Wind turbine 49 These countries would need to expand their resources to meet the estimated demand for 2020. 1047 1 Wind turbine 49 For example, currently the EU has 3% of world supply of fluorspar and it requires 14% by 2020. 1048 1 Wind turbine 49 Globally, the main exporting countries are South Africa, Mexico and China. 1049 1 Wind turbine 49 This is similar with other critical and valuable materials required for energy systems such as magnesium, silver and indium. 1050 1 Wind turbine 49 The levels of recycling of these materials are very low and focusing on that could alleviate supply. 1051 1 Wind turbine 49 Because most of these valuable materials are also used in other emerging technologies, like light emitting diodes (LEDs), photo voltaics (PVs) and liquid crystal displays (LCDs), their demand is expected to grow. 1052 1 Wind turbine 50 A study by the United States Geological Survey estimated resources required to fulfill the US commitment to supplying 20% of its electricity from wind power by 2030. 1053 1 Wind turbine 50 It did not consider requirements for small turbines or offshore turbines because those were not common in 2008 when the study was done. 1054 1 Wind turbine 50 Common materials such as cast iron, steel and concrete would increase by 2%–3% compared to 2008. 1055 1 Wind turbine 50 Between 110,000 and 115,000 metric tons of fiber glass would be required per year, a 14% increase. 1056 1 Wind turbine 50 Rare metal use would not increase much compared to available supply, however rare metals that are also used for other technologies such as batteries which are increasing its global demand need to be taken into account. 1057 1 Wind turbine 50 Land required would be 50,000 square kilometers onshore and 11,000 offshore. 1058 1 Wind turbine 50 This would not be a problem in the US due to its vast area and because the same land can be used for farming. 1059 1 Wind turbine 50 A greater challenge would be the variability and transmission to areas of high demand. 1060 1 Wind turbine 51 Permanent magnets for wind turbine generators contain rare metals such as neodymium (Nd), praseodymium (Pr), Terbium (Tb) and dysprosium (Dy). 1061 1 Wind turbine 51 Systems that use magnetic direct drive turbines require greater amounts of rare metals. 1062 1 Wind turbine 51 Therefore, an increase in wind turbine manufacture would increase the demand for these resources. 1063 1 Wind turbine 51 By 2035, the demand for Nd is estimated to increase by 4,000 to 18,000 tons and for Dy by 200 to 1200 tons. 1064 1 Wind turbine 51 These values are a quarter to half of current production. 1065 1 Wind turbine 51 However, these estimates are very uncertain because technologies are developing rapidly. 1066 1 Wind turbine 52 Reliance on rare earth minerals for components has risked expense and price volatility as China has been main producer of rare earth minerals (96% in 2009) and was reducing its export quotas. 1067 1 Wind turbine 52 However, in recent years other producers have increased production and China has increased export quotas, leading to an higher supply and lower cost, and a greater viability of large scale use of variable-speed generators. 1068 1 Wind turbine 53 Glass fiber is the most common material for reinforcement. 1069 1 Wind turbine 53 Its demand has grown due to growth in construction, transportation and wind turbines. 1070 1 Wind turbine 53 Its global market might reach US$17.4 billion by 2024, compared to US$8.5 billion in 2014. 1071 1 Wind turbine 53 In 2014, Asia Pacific produced more than 45% of the market; now China is the largest producer. 1072 1 Wind turbine 53 The industry receives subsidies from the Chinese government allowing it to export cheaper to the US and Europe. 1073 1 Wind turbine 53 However, price wars have led to anti-dumping measures such as tariffs on Chinese glass fiber. 1074 1 Wind turbine 54 Interest in recycling blades varies in different markets and depends on the waste legislation and local economics. 1075 1 Wind turbine 54 A challenge in recycling blades is related to the composite material, which is made of a thermosetting matrix and glass fibers or a combination of glass and carbon fibers. 1076 1 Wind turbine 54 Thermosetting matrix cannot be remolded to form new composites. 1077 1 Wind turbine 54 So the options are either to reuse the blade and the composite material elements as they are found in the blade or to transform the composite material into a new source of material. 1078 1 Wind turbine 54 In Germany, wind turbine blades are commercially recycled as part of an alternative fuel mix for a cement factory. 1079 1 Wind turbine 55 A few localities have exploited the attention-getting nature of wind turbines by placing them on public display, either with visitor centers around their bases, or with viewing areas farther away. 1080 1 Wind turbine 55 The wind turbines are generally of conventional horizontal-axis, three-bladed design, and generate power to feed electrical grids, but they also serve the unconventional roles of technology demonstration, public relations, and education. 1081 1 Wind turbine 56 Small wind turbines may be used for a variety of applications including on- or off-grid residences, telecom towers, offshore platforms, rural schools and clinics, remote monitoring and other purposes that require energy where there is no electric grid, or where the grid is unstable. 1082 1 Wind turbine 56 Small wind turbines may be as small as a fifty-watt generator for boat or caravan use. 1083 1 Wind turbine 56 Hybrid solar and wind powered units are increasingly being used for traffic signage, particularly in rural locations, as they avoid the need to lay long cables from the nearest mains connection point. 1084 1 Wind turbine 56 The U.S. Department of Energy's National Renewable Energy Laboratory (NREL) defines small wind turbines as those smaller than or equal to 100 kilowatts. 1085 1 Wind turbine 56 Small units often have direct drive generators, direct current output, aeroelastic blades, lifetime bearings and use a vane to point into the wind. 1086 1 Wind turbine 57 Larger, more costly turbines generally have geared power trains, alternating current output, and flaps, and are actively pointed into the wind. 1087 1 Wind turbine 57 Direct drive generators and aeroelastic blades for large wind turbines are being researched. 1088 1 Wind turbine 58 On most horizontal wind turbine farms, a spacing of about 6–10 times the rotor diameter is often upheld. 1089 1 Wind turbine 58 However, for large wind farms distances of about 15 rotor diameters should be more economical, taking into account typical wind turbine and land costs. 1090 1 Wind turbine 58 This conclusion has been reached by research conducted by Charles Meneveau of Johns Hopkins University and Johan Meyers of Leuven University in Belgium, based on computer simulations that take into account the detailed interactions among wind turbines (wakes) as well as with the entire turbulent atmospheric boundary layer. 1091 1 Wind turbine 59 Recent research by John Dabiri of Caltech suggests that vertical wind turbines may be placed much more closely together so long as an alternating pattern of rotation is created allowing blades of neighbouring turbines to move in the same direction as they approach one another. 1092 1 Wind turbine 60 Wind turbines need regular maintenance to stay reliable and available. 1093 1 Wind turbine 60 In the best case turbines are available to generate energy 98% of the time. 1094 1 Wind turbine 61 Modern turbines usually have a small onboard crane for hoisting maintenance tools and minor components. 1095 1 Wind turbine 61 However, large, heavy components like generator, gearbox, blades, and so on are rarely replaced, and a heavy lift external crane is needed in those cases. 1096 1 Wind turbine 61 If the turbine has a difficult access road, a containerized crane can be lifted up by the internal crane to provide heavier lifting. 1097 1 Wind turbine 62 Installation of new wind turbines can be controversial. 1098 1 Wind turbine 62 An alternative is repowering, where existing wind turbines are replaced with bigger, more powerful ones, sometimes in smaller numbers while keeping or increasing capacity. 1099 1 Wind turbine 63 Older turbines were in some early cases not required to be removed when reaching the end of their life. 1100 1 Wind turbine 63 Some still stand, waiting to be recycled or repowered. 1101 1 Wind turbine 64 A demolition industry develops to recycle offshore turbines at a cost of DKK 2–4 million per (MW), to be guaranteed by the owner. 1102 1 Wind turbine 65 Wind turbines produce electricity at between two and six cents per kilowatt hour, which is one of the lowest-priced renewable energy sources. 1103 1 Wind turbine 65 As technology needed for wind turbines continued to improve, the prices decreased as well. 1104 1 Wind turbine 65 In addition, there is currently no competitive market for wind energy, because wind is a freely available natural resource, most of which is untapped. 1105 1 Wind turbine 65 The main cost of small wind turbines is the purchase and installation process, which averages between $48,000 and $65,000 per installation. 1106 1 Wind turbine 65 The energy harvested from the turbine will offset the installation cost, as well as provide virtually free energy for years. 1107 1 Wind turbine 66 Wind turbines provide a clean energy source, use little water, emitting no greenhouse gases and no waste products. 1108 1 Wind turbine 66 Over 1,500 tons of carbon dioxide per year can be eliminated by using a one-megawatt turbine instead of one megawatt of energy from a fossil fuel. 1109 1 Wind turbine 67 Wind turbines can be very large, reaching over tall and with blades long, and people have often complained about their visual impact. 1110 1 Wind turbine 68 Environmental impact of wind power includes effect on wildlife, but can be mitigated if proper monitoring and mitigation strategies are implemented. 1111 1 Wind turbine 68 Thousands of birds, including rare species, have been killed by the blades of wind turbines, though wind turbines contribute relatively insignificantly to anthropogenic avian mortality. 1112 1 Wind turbine 68 For every bird killed by a wind turbine in the US, nearly 500,000 are killed by each of feral cats and buildings. 1113 1 Wind turbine 68 In comparison, conventional coal fired generators contribute significantly more to bird mortality, by incineration when caught in updrafts of smoke stacks and by poisoning with emissions byproducts (including particulates and heavy metals downwind of flue gases). 1114 1 Wind turbine 68 Further, marine life is affected by water intakes of steam turbine cooling towers (heat exchangers) for nuclear and fossil fuel generators, by coal dust deposits in marine ecosystems (e.g. 1115 1 Wind turbine 68 damaging Australia's Great Barrier Reef) and by water acidification from combustion monoxides. 1116 1 Wind turbine 69 "Energy harnessed by wind turbines is intermittent, and is not a ""dispatchable"" source of power; its availability is based on whether the wind is blowing, not whether electricity is needed." 1117 1 Wind turbine 69 Turbines can be placed on ridges or bluffs to maximize the access of wind they have, but this also limits the locations where they can be placed. 1118 1 Wind turbine 69 In this way, wind energy is not a particularly reliable source of energy. 1119 1 Wind turbine 69 However, it can form part of the energy mix, which also includes power from other sources. 1120 1 Wind turbine 69 Notably, the relative available output from wind and solar sources is often inversely proportional (balancing). 1121 1 Wind turbine 69 Technology is also being developed to store excess energy, which can then make up for any deficits in supplies. 1122 1 IPCC Second Assessment Report 1 The Second Assessment Report (SAR) of the Intergovernmental Panel on Climate Change (IPCC), published in 1996, is an assessment of the then available scientific and socio-economic information on climate change. 1123 1 IPCC Second Assessment Report 1 It was superseded by the Third Assessment Report (TAR) in 2001. 1124 1 IPCC Second Assessment Report 2 "The Second Assessment Report, titled ""Climate Change 1995"", consists of reports from each of the three Working Groups, and a Synthesis Report:" 1125 1 IPCC Second Assessment Report 4 "These reports were prepared by over two thousand experts, and ""contain the factual basis of the issue of climate change, gleaned from available expert literature and further carefully reviewed by experts and governments." 1126 1 IPCC Second Assessment Report 5 The Synthesis Report gave its purpose as providing the scientific, technical and socio-economic information for determining 1127 1 IPCC Second Assessment Report 5 Working Group I, dealing with the scientific aspects of climate, stated that 1128 1 IPCC Second Assessment Report 5 Working Group I subsequently characterized its reports in the First and Second Assessments as progressing from an understanding that the greenhouse effect is well understood, greenhouse gases are increasing (due largely to human activity), and therefore should lead to significant global warming (though lack of understanding limited specific regional predictions), to a greater understanding (despite continuing uncertainties) that global warming continues and is most likely due to human activity, and that very substantial cuts in emissions would be required to stabilize greenhouse gas concentrations. 1129 1 IPCC Second Assessment Report 5 "Working Group II assessed whether the range of plausible impacts of global warming constitutes dangerous anthropogenic interference with the climate system, while Working Group III provided information to help countries ""take decisions they believe are most appropriate for their specific circumstances""." 1130 1 IPCC Second Assessment Report 6 "In the IPCC process, a ""convening lead author"" for each chapter worked with other lead authors and contributing authors to agree the structure of the chapter, and assign teams of scientists to write each section of the chapter, producing a draft which was subject to acceptance by the whole author group." 1131 1 IPCC Second Assessment Report 6 Participating governments then provided review comments on the draft, incorporated into the assessment which was presented to seek acceptance at a plenary session of the IPCC. 1132 1 IPCC Second Assessment Report 7 The IPCC chairman Bert Bolin had difficulty finding a convening lead author for Chapter 8. 1133 1 IPCC Second Assessment Report 7 After delays, Benjamin D. Santer who was doing postdoctoral research on the topic was persuaded to take on the task. 1134 1 IPCC Second Assessment Report 7 Twenty participants from various countries met at the initial meeting in Livermore, California, in August 1994 to identify the scientific topic areas, and discussion continued by email. 1135 1 IPCC Second Assessment Report 7 At the first drafting session (in Sigtuna, Sweden, in October) Santer persuaded the others that the chapter should discuss observational and model uncertainties, though these were also covered in other chapters. 1136 1 IPCC Second Assessment Report 7 "The ""zeroth"" draft was then sent out for peer review to scientific topic experts, all the chapter authors and lead authors of other chapters." 1137 1 IPCC Second Assessment Report 7 Their responses were incorporated in the second drafting session in March 1995 at Brighton. 1138 1 IPCC Second Assessment Report 7 "In May the entire draft Working Group I report as well as the summary for policymakers was submitted for full ""country review"" by participating governments, to provide comments for incorporation at the third drafting session at Asheville, North Carolina, in July." 1139 1 IPCC Second Assessment Report 7 Because of the delayed timing, Santer did not receive government comments for this meeting, some did not arrive until the plenary meeting in November. 1140 1 IPCC Second Assessment Report 8 "The Chapter 8 draft report put together on 5 October had an Executive Summary of the evidence, and after various qualifications, said ""Taken together, these results point towards a human influence on climate." 1141 1 IPCC Second Assessment Report 8 "Governments at the November plenary meeting in Madrid demanded changes to how this was worded in the Summary for Policymakers, after extended discussions Bolin suggested the adjective ""discernible"" and this was agreed." 1142 1 IPCC Second Assessment Report 8 "The approved Summary for Policymakers includes a section headed ""The balance of evidence suggests a discernible human influence on global climate"", setting out progress in detection and attribution studies, cautioning that ""Our ability to quantify the human influence on global climate is currently limited because the expected signal is still emerging from the noise of natural variability, and because there are uncertainties in key factors." 1143 1 IPCC Second Assessment Report 8 Santer was subsequently required by the IPCC to bring the rest of the chapter into compliance with this wording. 1144 1 IPCC Second Assessment Report 8 "The summary at the start of the accepted version of the chapter stated that ""these results indicate that the observed trend in global mean temperature over the past 100 years is unlikely to be entirely natural in origin." 1145 1 IPCC Second Assessment Report 8 More importantly, there is evidence of an emerging pattern of climate response to forcings by greenhouse gases and sulphate aerosols in the observed climate record. 1146 1 IPCC Second Assessment Report 8 Taken together, these results point towards a human influence on global climate. 1147 1 IPCC Second Assessment Report 8 "The final paragraph in the chapter stated ""The body of statistical evidence in Chapter 8, when examined in the context of our physical understanding of the climate system, now points to a discernible human influence on global climate." 1148 1 IPCC Second Assessment Report 8 "An introductory preface to the SAR written by IPCC chairman Bolin and his co-chairs John T. Houghton and L. Gylvan Meira Filho highlighted ""that observations suggest 'a discernible human influence on global climate', one of the key findings of this report, adds an important new dimension to discussion of the climate issue." 1149 1 IPCC Second Assessment Report 9 "Prior to the publication of the Second Assessment Report, the industry group Global Climate Coalition distributed a report entitled ""The IPCC: Institutionalized Scientific Cleansing"" to reporters, US Congressmen, and scientists, which said that Santer had altered the text, after acceptance by the Working Group, and without approval of the authors, to strike content characterizing the uncertainty of the science." 1150 1 IPCC Second Assessment Report 9 Three weeks later, and a week after the Second Assessment Report was released, the Global Climate Coalition was echoed in a letter published in The Wall Street Journal from the retired condensed matter physicist and former president of the US National Academy of Sciences, Frederick Seitz, chair of the George C. Marshall Institute and Science and Environmental Policy Project, but not a climatologist. 1151 1 IPCC Second Assessment Report 9 "In this letter, Seitz alleged that Santer had perpetrated ""a disturbing corruption of the peer-review process." 1152 1 IPCC Second Assessment Report 9 "Seitz criticized the conclusions of Chapter 8, and wrote that ""key changes were made after the scientists had met and accepted what they thought was the final peer-reviewed version"", deleting ""hints of the skepticism"" he attributed to other unnamed scientists." 1153 1 IPCC Second Assessment Report 10 The position of the lead author of Chapter 8, Benjamin D. Santer, was supported by fellow IPCC authors and senior figures of the American Meteorological Society (AMS) and University Corporation for Atmospheric Research (UCAR). 1154 1 IPCC Second Assessment Report 10 "The presidents of the AMS and UCAR stated that there was a ""systematic effort by some individuals to undermine and discredit the scientific process that has led many scientists working on understanding climate to conclude that there is a very real possibility that humans are modifying Earth's climate on a global scale." 1155 1 IPCC Second Assessment Report 11 "Other rebuttals of Seitz's comments include a 1997 paper by Paul Edwards and IPCC author Stephen Schneider, and a 2007 complaint to the UK broadcast regulator Ofcom about the television programme, ""The Great Global Warming Swindle""." 1156 1 IPCC Second Assessment Report 11 The 2007 complaint includes a rebuttal of Seitz's claims by the former IPCC chairman, Bert Bolin. 1157 1 IPCC Second Assessment Report 12 One of the controversies of the Second Assessment Working Group III report is the economic valuation of human life, which is used in monetized (i.e., converted into US dollar values) estimates of climate change impacts. 1158 1 IPCC Second Assessment Report 12 "Often in these monetized estimates, the health risks of climate change are valued so that they are ""consistent"" with valuations of other health risks." 1159 1 IPCC Second Assessment Report 12 There are a wide range of views on monetized estimates of climate change impacts. 1160 1 IPCC Second Assessment Report 12 The strengths and weaknesses of monetized estimates are discussed in the SAR and later IPCC assessments. 1161 1 IPCC Second Assessment Report 13 In the preparation of the SAR, disagreement arose over the Working Group III Summary for Policymakers (SPM). 1162 1 IPCC Second Assessment Report 13 The SPM is written by a group of IPCC authors, who then discuss the draft with government delegates from all of the UNFCCC Parties (i.e., delegates from most of the world's governments). 1163 1 IPCC Second Assessment Report 13 "The economic valuation of human life (referred to by economists as the ""value of statistical life"") was viewed by some governments (such as India) as suggesting that people living in poor countries are worth less than people living in rich countries." 1164 1 IPCC Second Assessment Report 13 David Pearce, who was a lead author of the relevant chapter of the SAR, officially dissented on the SPM. 1165 1 IPCC Second Assessment Report 13 According to Pearce: 1166 1 IPCC Second Assessment Report 13 The relevant chapter [of the Report] values of statistical life based on actual studies in different countries [...] What the authors of Chapter 6 did not accept, and still do not accept, was the call from a few [government] delegates for a common valuation based on the highest number for willingness to pay. 1167 1 IPCC Second Assessment Report 14 "In other words, a few government delegates wanted ""statistical lives"" in poor countries to be valued at the same level as ""statistical lives"" in rich countries." 1168 1 IPCC Second Assessment Report 14 IPCC author Michael Grubb later commented: 1169 1 IPCC Second Assessment Report 14 Many of us think that the governments were basically right. 1170 1 IPCC Second Assessment Report 14 The metric [used by Pearce] makes sense for determining how a given government might make tradeoffs between its own internal projects. 1171 1 IPCC Second Assessment Report 14 But the same logic fails when the issue is one of damage inflicted by some countries on others: why should the deaths inflicted by the big emitters — principally the industrialised countries — be valued differently according to the wealth of the victims' countries? 1172 1 IPCC Second Assessment Report 16 The Second Assessment Report consists of the following reports from each of the three Working Groups, and a Synthesis Report. 1173 1 IPCC Second Assessment Report 16 The WG2 report has on-line text; all are available in PDF format at the IPCC's documents web page. 1174 1 World Scientists' Warning to Humanity 1 In November 2017, 15,364 scientists signed a World Scientists' Warning to Humanity: A Second Notice written by lead author professor of ecology, William J. Ripple of Oregon State University, along with 7 co-authors calling for, among other things, limiting population growth, and drastically diminishing per capita consumption of fossil fuels, meat, and other resources. 1175 1 World Scientists' Warning to Humanity 1 The Second Notice included 9 time-series graphs of key indicators, each correlated to a specific issue mentioned in the original 1992 warning, to show that most environmental issues are continuing to trend in the wrong direction, most with no discernible change in rate. 1176 1 World Scientists' Warning to Humanity 1 The article included 13 specific steps humanity could take to transition to sustainability. 1177 1 World Scientists' Warning to Humanity 2 The Second Notice has more scientist cosigners and formal supporters than any other journal article ever published. 1178 1 World Scientists' Warning to Humanity 2 "The full warning was published in ""BioScience"" and it can still be endorsed on the Scientists Warning website." 1179 1 World Scientists' Warning to Humanity 3 "In late 1992, the late Henry W. Kendall, a former chair of the Union of Concerned Scientists (UCS) board of directors, wrote the first warning World Scientists' Warning to Humanity, which begins: ""Human beings and the natural world are on a collision course." 1180 1 World Scientists' Warning to Humanity 3 A majority of the Nobel Prize laureates in the sciences signed the document; about 1,700 of the world's leading scientists appended their signature. 1181 1 World Scientists' Warning to Humanity 4 "It was sometimes offered in opposition to the Heidelberg Appeal—also signed by numerous scientists and Nobel laureates earlier in 1992—which begins by criticizing ""an irrational ideology which is opposed to scientific and industrial progress, and impedes economic and social development." 1182 1 World Scientists' Warning to Humanity 4 This document was often cited by those who oppose theories relating to climate change. 1183 1 World Scientists' Warning to Humanity 5 "However, the Heidelberg Appeal offers no specific recommendations and is not an indictment of environmental science: ""We fully subscribe to the objectives of a scientific ecology for a universe whose resources must be taken stock of, monitored and preserved." 1184 1 World Scientists' Warning to Humanity 5 But we herewith demand that this stock-taking, monitoring and preservation be founded on scientific criteria and not on irrational pre-conceptions. 1185 1 World Scientists' Warning to Humanity 6 "In contrast, the UCS-led petition contains specific recommendations: ""We must, for example, move away from fossil fuels to more benign, inexhaustible energy sources to cut greenhouse gas emissions and the pollution of our air and water." 1186 1 World Scientists' Warning to Humanity 6 ... We must stabilize population. 1187 1 Business action on climate change 1 Business action on climate change includes a range of activities relating to global warming, and to influencing political decisions on global-warming-related regulation, such as the Kyoto Protocol. 1188 1 Business action on climate change 1 Major multinationals have played and to some extent continue to play a significant role in the politics of global warming, especially in the United States, through lobbying of government and funding of global warming deniers. 1189 1 Business action on climate change 1 Business also plays a key role in the mitigation of global warming, through decisions to invest in researching and implementing new energy technologies and energy efficiency measures. 1190 1 Business action on climate change 1 (See also individual and political action on climate change.) 1191 1 Business action on climate change 2 In 1989 in the US, the petroleum and automotive industries and the National Association of Manufacturers created the Global Climate Coalition (GCC) to oppose mandatory actions to address global warming. 1192 1 Business action on climate change 2 In 1997, when the US Senate overwhelmingly passed a resolution against ratifying the Kyoto Protocol, the industry funded a $13 million industry advertising blitz in the run-up to the vote. 1193 1 Business action on climate change 3 "In 1998 ""The New York Times"" published an American Petroleum Institute (API) memo outlining a strategy aiming to make ""recognition of uncertainty ... part of the 'conventional wisdom." 1194 1 Business action on climate change 3 "The memo has been compared to a late 1960s memo by tobacco company Brown and Williamson, which observed: ""Doubt is our product since it is the best means of competing with the 'body of fact' that exists in the mind of the general public." 1195 1 Business action on climate change 3 It is also the means of establishing a controversy. 1196 1 Business action on climate change 3 Those involved in the memo included Jeffrey Salmon, then executive director of the George C. Marshall Institute, Steven Milloy, a prominent denialist commentator, and the Competitive Enterprise Institute's Myron Ebell. 1197 1 Business action on climate change 3 In June 2005 a former API lawyer, Philip Cooney, resigned his White House post after accusations of politically motivated tampering with scientific reports. 1198 1 Business action on climate change 4 "In 2002 the GCC considered its work in the US against regulation on global warming to have been so successful that it ""deactivated"" itself, although the loss of some leading members may also have been a factor." 1199 1 Business action on climate change 5 At the same time, since 1989 many previously denialist petroleum and automobile industry corporations have changed their position as the political and scientific consensus has grown, with the creation of the Kyoto Protocol and the publication of the International Panel on Climate Change's Second and Third Assessment Reports. 1200 1 Business action on climate change 5 These corporations include major petroleum companies like Royal Dutch Shell, Texaco, and BP, as well as automobile manufacturers like Ford, General Motors, and DaimlerChrysler. 1201 1 Business action on climate change 5 Some of these have joined with the Center for Climate and Energy Solutions (formerly the Pew Center on Global Climate Change), a non-profit organization aiming to support efforts to address global climate change. 1202 1 Business action on climate change 6 Since 2000, the Carbon Disclosure Project has been working with major corporations and investors to disclose the emissions of the largest companies. 1203 1 Business action on climate change 6 By 2007, the CDP published the emissions data for 2400 of the largest corporations in the world, and represented major institutional investors with $41 trillion combined assets under management. 1204 1 Business action on climate change 6 The pressure from these investors had had some success in working with companies to reduce emissions. 1205 1 Business action on climate change 7 The World Business Council for Sustainable Development, a CEO-led association of some 200 multinational companies, has called on governments to agree on a global targets, and suggests that it is necessary to cut emissions by 60-80 percent from current levels by 2050. 1206 1 Business action on climate change 8 In 2017, after the election of Donald Trump, backing was shown in the business community for the Paris Agreement, which became effective November 4, 2016. 1207 1 Business action on climate change 9 A central organization in climate denial was the Global Climate Coalition (1989–2002), a group of mainly United States businesses opposing immediate action to reduce greenhouse gas emissions. 1208 1 Business action on climate change 9 The coalition funded deniers with scientific credentials to be public spokespeople, provided industry a voice on climate change, and fought the Kyoto Protocol. 1209 1 Business action on climate change 9 "The New York Times"" reported that ""even as the coalition worked to sway opinion [towards denial], its own scientific and technical experts were advising that the science backing the role of greenhouse gases in global warming could not be refuted." 1210 1 Business action on climate change 10 In the year 2000, the rate of corporate members leaving accelerated when they became the target of a national divestiture campaign run by John Passacantando and Phil Radford with the organization Ozone Action. 1211 1 Business action on climate change 10 "According to ""The New York Times"", when Ford Motor Company was the first company to leave the coalition, it was “the latest sign of divisions within heavy industry over how to respond to global warming.” After that, between December 1999 and early March 2000, the GCC was deserted by Daimler-Chrysler, Texaco, the Southern Company and General Motors." 1212 1 Business action on climate change 11 The organization closed in 2002, or in their own words, 'deactivated'. 1213 1 Business action on climate change 12 The U.S. 1214 1 Business action on climate change 12 Climate Action Partnership (USCAP) was formed in January 2007 with the primary goal of influencing the US government's regulation of greenhouse gas emissions. 1215 1 Business action on climate change 12 Original members included General Electric, Alcoa, Natural Resources Defense Council, etc., but they were joined in April, 2007 by ConocoPhilips and AIG. 1216 1 Business action on climate change 13 ExxonMobil has been a leading figure in the business world's position on climate change, providing substantial funding to a range of global-warming-denialist organizations. 1217 1 Business action on climate change 13 "Mother Jones"" counted some 40 ExxonMobil-funded organization that ""either have sought to undermine mainstream scientific findings on global climate change or have maintained affiliations with a small group of ""skeptic"" (denialist) scientists who continue to do so." 1218 1 Business action on climate change 13 Between 2000 and 2003 these organizations received more than $8m in funding. 1219 1 Business action on climate change 14 It has also had a key influence in the Bush administration's energy policy, including on the Kyoto Protocol, supported by both $55m spent on lobbying since 1999, and direct contacts between the company and leading politicians. 1220 1 Business action on climate change 14 It was a leading member of the Global Climate Coalition. 1221 1 Business action on climate change 14 It encouraged (and may have been instrumental in) the replacement in 2002 of the head of the IPCC, Robert Watson. 1222 1 Business action on climate change 14 It has also invested $100m into the Global Climate and Energy Project, with Stanford University, and other programs at institutions such as the Massachusetts Institute of Technology, Carnegie Mellon University and the International Energy Agency Greenhouse Gas Research and Development Program. 1223 1 Business action on climate change 15 Some of Exxon's activities on climate change produced strong criticism from environmental groups, including reactions such as a leaflet produced by the Stop Esso campaign, saying 'Don't buy E$$o', and featuring a tiger hand setting fire to the Earth. 1224 1 Business action on climate change 15 The company's carbon dioxide emissions are more than 50% higher than those of British rival BP, despite the US firm's oil and gas production being only slightly larger. 1225 1 Business action on climate change 16 According to a 2004 study commissioned by Friends of the Earth, ExxonMobil and its predecessors caused 4.7 to 5.3 percent of the world's man-made carbon dioxide emissions between 1882 and 2002. 1226 1 Business action on climate change 16 The group suggested that such studies could form the basis for eventual legal action. 1227 1 Business action on climate change 17 BP left the Global Climate Coalition in 1997 and said that global warming was a problem that had to be dealt with, although it subsequently joined others in lobbying the Australian government not to sign the Kyoto Protocol unless the US did. 1228 1 Business action on climate change 17 "In March 2002 BP's chief executive, Lord Browne, declared in a speech that global warming was real and that urgent action was needed, saying that ""Companies composed of highly skilled and trained people can't live in denial of mounting evidence gathered by hundreds of the most reputable scientists in the world.""." 1229 1 Business action on climate change 17 In 2005 BP was considering testing carbon sequestration in one of its North Sea oil fields, by pumping carbon dioxide into them (and thereby also increasing yields). 1230 1 Business action on climate change 17 Throughout 2006 BP, led by their CEO Lord John Browne, has continued to take a leadership stance on climate change. 1231 1 Business action on climate change 17 It has cut its own operational emissions of CO by 10%. 1232 1 Business action on climate change 17 It is investing $8 billion in renewable energy over the next 10 years. 1233 1 Business action on climate change 17 And most recently it has launched a 'target zero' campaign in the UK to encourage its customers to offset their vehicle emissions when they fill up at the petrol station. 1234 1 Business action on climate change 18 BP's American division is a member of the U.S. 1235 1 Business action on climate change 18 Climate Action Partnership (USCAP) (see above). 1236 1 Business action on climate change 19 From 2005 to 2008, Koch Industries donated $5.7 million on political campaigns and $37 million on direct lobbying to support fossil fuel industries. 1237 1 Business action on climate change 19 Between 1997 and 2008, Koch Industries donated a total of nearly $48 million to climate opposition groups. 1238 1 Business action on climate change 19 "According to Greenpeace, Koch Industries is the major source of funds of what Greenpeace calls ""climate denial""." 1239 1 Business action on climate change 19 Koch Industries and its subsidiaries spent more than $20 million on lobbying in 2008 and $12.3 million in 2009, according to the Center for Responsive Politics, a nonpartisan research group. 1240 1 Business action on climate change 20 "American Electric Power, the world's largest private producer of carbon dioxide, said in 2005 that targets for carbon reduction ""represent a common-sense approach that can begin the process of lowering emissions along a gradual, cost-effective path." 1241 1 Business action on climate change 20 "The company complained that ""uncertainties over the cost of carbon"" made it very difficult to make decisions about capital investment." 1242 1 Business action on climate change 21 DuPont has cut its greenhouse gas emissions by 65% since 1990, saving hundreds of millions of dollars in the process. 1243 1 Business action on climate change 21 "Give us a date, tell us how much we need to cut, give us the flexibility to meet the goals, and we'll get it done"", Xcel Energy CEO Wayne Brunetti told ""Business Week"" in 2004." 1244 1 Business action on climate change 22 Duke Energy, FPL Group, and PG&E Corporation are members of the U.S. 1245 1 Business action on climate change 22 Climate Action Partnership (USCAP) (see above). 1246 1 Business action on climate change 23 A large proportion of carbon dioxide emissions occur because of transportation. 1247 1 Business action on climate change 23 Several companies have formed or invested in electric substitutes for standard automobiles. 1248 1 Business action on climate change 23 The Tesla Roadster (2008) is an all-electric sports car, and Tesla also produces the Tesla Model S sedan. 1249 1 Business action on climate change 23 Vectrix produces and sells an electric scooter rated for 100 km/h (60 mph). 1250 1 Business action on climate change 24 There has also been greatly increased interest in personal rapid transit, which applies system engineering principles to reduce energy use, eliminate traffic jams, and produce an acceptable substitute to replace cars, all at the same time. 1251 1 Business action on climate change 24 Most systems fully meet Kyoto Treaty carbon emission goals now, 60 years ahead of schedule. 1252 1 Business action on climate change 24 Korean steel maker POSCO and its partner Vectus Ltd. have produced a working safety case, including test track and vehicles, that remains fully functional in Swedish winters. 1253 1 Business action on climate change 24 Vectus and Suncheon S. Korea signed a memorandum of understanding to install a system. 1254 1 Business action on climate change 24 Advanced Transportation Systems' ULTra passed safety certification by the UK Rail Inspectorate in 2003, and won a demonstration project at Heathrow Airport due to be in service in early 2010. 1255 1 Business action on climate change 24 ATS Ltd. estimates its ULTra PRT will consume 839 BTU per passenger mile (0.55 MJ per passenger km). 1256 1 Business action on climate change 24 By comparison, automobiles consume 3,496 BTU, and personal trucks consume 4,329 BTU per passenger mile. 1257 1 Business action on climate change 24 2getthere Inc. sells automated electric freight handling and transit vehicles designed to share existing rights of way with normal traffic. 1258 1 Business action on climate change 24 The company recently won the personal rapid transit competition for Masdar. 1259 1 Business action on climate change 25 In 2004 Swiss Re, the world's second largest reinsurance company, warned that the economic costs of climate-related disasters threatened to reach $150 billion a year within ten years. 1260 1 Business action on climate change 26 In 2006 Lloyd's of London, published a report highlighting the latest science and implications for the insurance industry. 1261 1 Business action on climate change 27 Swiss Re, has said that if the shore communities of four Gulf Coast states choose not to implement adaptation strategies, they could see annual climate-change related damages jump 65 percent a year to $23 billion by 2030. 1262 1 Business action on climate change 27 "Society needs to reduce its vulnerability to climate risks, and as long as they remain manageable, they remain insurable, which is our interest as well,"" said Mark D. Way, head of Swiss Re's sustainable development for the Americas." 1263 1 Business action on climate change 28 AIG is a member of the U.S. 1264 1 Business action on climate change 28 Climate Action Partnership (USCAP) (see above). 1265 1 Business action on climate change 29 "In the UK, some newspapers (""Daily Mail"", ""Daily Telegraph"") are significantly anti-science, while most others (with varying enthusiasm, ""The Independent"" giving it most prominence) support action on global warming." 1266 1 Business action on climate change 29 Overall, British newspapers have given the issue three times more coverage than US newspapers. 1267 1 Business action on climate change 29 "In 2006 (""British Sky Broadcasting"" (Sky) became the world's first media company to go 'climate neutral' by purchasing enough carbon offsets." 1268 1 Business action on climate change 29 "The CEO of the company James Murdoch (son of Rupert Murdoch and heir apparent for the News International empire) is a strong advocate of action on climate change and is thought to be influential on the issue within the wider group of companies, ""The Sun"" announced it was ""going green"" and now covers the global warming issue extensively." 1269 1 Business action on climate change 29 In June 2006, to much industry interest, Rupert Murdoch invited Al Gore to make his climate change presentation at the annual News Corp (including the Fox Network) gathering at the Pebble Beach golf resort, (USA). 1270 1 Business action on climate change 29 In August 2007, Rupert Murdoch announced plans for News Corp. to be carbon neutral by 2010. 1271 1 Business action on climate change 30 Businesses take action on climate change for several reasons. 1272 1 Business action on climate change 30 Action improves corporate image and better aligns corporate actions with the environmental interests of owners, employees, suppliers, and customers. 1273 1 Business action on climate change 30 Action also occurs to reduce costs, increase return on investments, and to reduce dependency on uncontrollable costs. 1274 1 Business action on climate change 31 For many companies, looking at more efficient energy use can pay off in the medium to long term; unfortunately, shareholders need to be satisfied in the short term, so regulatory intervention is often required, to encourage prudent conservation measures. 1275 1 Business action on climate change 31 However, as carbon intensity starts to show up on balance books through organizations such as the Carbon Disclosure Project, voluntary action is starting to take place. 1276 1 Business action on climate change 32 Recently there has been a spate of companies acting to improve their energy efficiency. 1277 1 Business action on climate change 32 Possibly the most prominent of these companies is Wal-Mart. 1278 1 Business action on climate change 32 Wal-Mart, the largest retailer in the US, has announced specific environmental goals to reduce energy use in its stores and pressure its 60,000 suppliers in its worldwide supply chain to follow its lead. 1279 1 Business action on climate change 32 On energy efficiency, Wal-Mart wants to increase the fuel efficiency of its truck fleet by 25% over the next three years and double it within ten years, moving from 6.5 mpg. 1280 1 Business action on climate change 32 This seems an attainable goal, and by 2020, it is expected to save the company $494 million a year. 1281 1 Business action on climate change 32 The company also wants to build a store that is at least 25% more energy efficient within four years. 1282 1 Business action on climate change 33 In August 2002, the largest gathering of ministers in the history of the world met at the World Summit on Sustainable Development in Johannesburg. 1283 1 Business action on climate change 33 The global environmental community discussed the role of renewables and energy efficiency in lowering carbon emissions, mitigating poverty reduction (energy access) and improving energy security. 1284 1 Business action on climate change 33 One result from WSSD was the formation of to carry forward the international dialogue on sustainable energy and its role in the energy mix. 1285 1 Business action on climate change 34 Partnerships formed include the Renewable Energy and Energy Efficiency Partnership, the Global Village Energy Partnership, the Johannesburg Renewable Energy Coalition (JREC), and the Global Network on Energy for Sustainable Development. 1286 1 Business action on climate change 35 Renewable energies and renewable energy technologies have many advantages over their fossil fuel counterparts. 1287 1 Business action on climate change 35 These advantages include the absence of local pollution such as particulates, sulphur oxides (SOX's) and nitrous oxides (NOX's). 1288 1 Business action on climate change 35 For the business community, the economic advantages are also becoming clearer. 1289 1 Business action on climate change 35 Numerous studies have shown that the working environment has a significant effect on workforce morale. 1290 1 Business action on climate change 35 Renewable energy solutions are a part of this, wind turbines in particular being seen by many as a potent symbol of a new modernity, where environmental considerations are taken seriously. 1291 1 Business action on climate change 35 A workforce seeing a forward-looking and responsible company is more likely to feel good about working for such a company. 1292 1 Business action on climate change 35 A happier workforce is a more productive workforce. 1293 1 Business action on climate change 36 More directly, the high petroleum (oil) and gas prices of 2005 have only added to the attraction of renewable energy sources. 1294 1 Business action on climate change 36 Although most renewable energies are more expensive at current fuel prices, the difference is narrowing, and uncertainty in oil and gas markets is a factor worth considering for highly energy-intensive businesses. 1295 1 Business action on climate change 37 Another factor affecting the uptake of renewable energies in Europe is the EU Energy Trading Scheme (ETS or EUTS). 1296 1 Business action on climate change 37 "Many large businesses are fined for increases in emissions, but can sell any ""excess"" reductions they make." 1297 1 Business action on climate change 38 Companies with high-profile renewable energy portfolios include an aluminium smelter (Alcan), a cement company (Lafarge), and a microchip manufacturer (Intel). 1298 1 Business action on climate change 38 Many examples of corporate leadership in this area can be found on the website of The Climate Group, an independent organization set up for promoting such action by business and government. 1299 1 Business action on climate change 39 The principle of carbon offset is fairly simple: a business decides that it doesn't want to contribute further to global warming, and it has already made efforts to reduce its carbon (dioxide) emissions, so it decides to pay someone else to further reduce its net emissions by planting trees or by taking up low-carbon technologies. 1300 1 Business action on climate change 39 Every unit of carbon that is absorbed by trees—or not emitted due to funding of renewable energy deployment—offsets the emissions from fossil fuel use. 1301 1 Business action on climate change 39 "In many cases, funding of renewable energy, energy efficiency, or tree planting—particularly in developing nations—can be a relatively cheap way of making an event, project, or business ""carbon neutral""." 1302 1 Business action on climate change 39 Many carbon offset providers—some as inexpensive as $0.10 per ton of carbon dioxide—are referenced in the Carbon Offset article of this encyclopedia. 1303 1 Business action on climate change 40 Many businesses are now looking to carbon offset all their work. 1304 1 Business action on climate change 40 An example of a business going carbon neutral is FIFA: their 2006 World Cup Final will be carbon neutral. 1305 1 Business action on climate change 40 FIFA estimate they are offsetting one hundred thousand tons of carbon dioxide created by the event, largely as a result of people travelling there. 1306 1 Business action on climate change 40 Other carbon neutral companies include the bank HSBC, the consumer staples manufacturer Annie's Homegrown, world leading society publisher Blackwell Publishing, and the publishing house New Society Publishers. 1307 1 Business action on climate change 40 The Guardian newspaper also offsets its carbon emissions resulting from international air travel. 1308 1 Laurie David 1 Laurie Ellen David (née Lennard; born March 22, 1958) is an American environmental activist. 1309 1 Laurie David 1 "She produced the Academy Award-winning ""An Inconvenient Truth"" and, most recently, teamed up with Katie Couric to executive produce ""Fed Up"", a film about the causes of obesity in the United States." 1310 1 Laurie David 1 "She serves as a trustee on the Natural Resources Defense Council and a member of the Advisory Board of the Children's Nature Institute and is a contributing blogger to ""The Huffington Post""." 1311 1 Laurie David 2 Laurie Ellen Lennard was born and raised in a middle class Jewish family on Long Island. 1312 1 Laurie David 3 In 1979, she graduated from Ohio University with a degree in journalism. 1313 1 Laurie David 3 "She was married for 14 years to Larry David (co-creator of ""Seinfeld"" and creator of ""Curb Your Enthusiasm"")." 1314 1 Laurie David 3 They married in 1993, and Laurie David filed for divorce on July 19, 2007. 1315 1 Laurie David 3 They have two daughters, Cazzie Laurel (b. 1316 1 Laurie David 3 May 10, 1994) and Romy March (b. 1317 1 Laurie David 3 March 2, 1996). 1318 1 Laurie David 4 Before working full-time on environmental and political issues, David worked in the entertainment industry. 1319 1 Laurie David 4 She began her career in New York City as a talent coordinator for the Late Show with David Letterman. 1320 1 Laurie David 4 Four years later she left to start her own management company, representing comedians and comedy writers. 1321 1 Laurie David 5 She also produced several comedy specials for HBO, Showtime, MTV, and Fox Television. 1322 1 Laurie David 5 Upon moving to Los Angeles, she became vice president of comedy development for a division of Fox Broadcasting and developed sitcoms for 20th Century Fox Television. 1323 1 Laurie David 6 Laurie David has worked publicly on projects aimed at stopping climate change. 1324 1 Laurie David 6 "She founded the ""Stop Global Warming Virtual March"" with Senator John McCain and Robert F. Kennedy, Jr. ""Ms."" magazine quoted Laurie David about the grassroots aspect of her campaign: ""If everyone does one thing, they are likely to do two things, then three things." 1325 1 Laurie David 6 Then they are likely to influence friends and family, and that's how you build a movement. 1326 1 Laurie David 6 "In addition to the Virtual March, David has produced other projects to bring the issue of climate change into mainstream popular culture, including the release of her first book, ""Stop Global Warming: The Solution Is You!" 1327 1 Laurie David 6 ", and the comedy special, ""Earth to America!" 1328 1 Laurie David 6 for TBS, which aired November 20, 2005. 1329 1 Laurie David 6 "Aside from the Academy Award-winning documentary ""An Inconvenient Truth"", David produced HBO's ""Too Hot Not to Handle"" (a documentary on the effects of climate change in the United States), which aired on April 22, 2006." 1330 1 Laurie David 6 "Laurie David also appeared in ""Big Ideas for a Small Planet"", an environmentalist documentary series on the Sundance Channel." 1331 1 Laurie David 7 "In an interview with ""The Guardian"" in November 2006, David acknowledged that owning two homes on opposite sides of the country and flying in a private jet several times per year is at odds with her message to others." 1332 1 Laurie David 7 "In the interview she notes ""Yes, I take a private plane on holiday a couple of times a year, and I feel horribly guilty about it." 1333 1 Laurie David 7 I probably shouldn't do it. 1334 1 Laurie David 7 But the truth is, I'm not perfect. 1335 1 Laurie David 7 This is not about perfection. 1336 1 Laurie David 7 I don't expect anybody else to be perfect either. 1337 1 Laurie David 7 That's what hurts the environmental movement – holding people to a standard they cannot meet. 1338 1 Laurie David 7 That just pushes people away. 1339 1 Laurie David 8 In 2005, and then again in 2009, David was cited by the Chilmark Conservation Commission for paving over protected wetland areas on her estate on Martha's Vineyard. 1340 1 Laurie David 9 As a trustee of the Natural Resources Defense Council and a founding member of The Detroit Project , David has spearheaded numerous public education and action campaigns urging Congress and auto-makers to raise fuel efficiency standards and make higher mileage cars. 1341 1 Laurie David 9 In January 2004, the NRDC opened the David Family Environmental Action Center. 1342 1 Laurie David 9 Endowed by the David family, the Center promotes activism to protect the environment. 1343 1 Laurie David 9 It features exhibits on issues such as global warming, ocean pollution, everyday toxins, and green building solutions. 1344 1 Laurie David 10 In 2003, she was honored by Robert F. Kennedy Jr.'s organization, Riverkeeper. 1345 1 Laurie David 10 She also received the Los Angeles-based Children's Nature Institute's Leaf Award in 2003 for her commitment to the environmental education of young children. 1346 1 Laurie David 11 "In October 2006, David was featured in ""Glamour"" as one of its “Women of the Year”." 1347 1 Laurie David 11 She received the Gracie Allen Award for Individual Achievement by the American Women in Radio & Television and the NRDC's 2006 Forces for Nature award for her work against global warming. 1348 1 Laurie David 12 "David's book ""The Family Dinner"" was published in 2010, with recipes by Kirstin Uhrenholdt, a foreword by Harvey Karp and an afterword by Jonathan Safran Foer." 1349 1 Laurie David 12 The book advocated for a return to the domestic tradition of an evening meal (sometimes called supper) shared around the family table. 1350 1 Laurie David 12 "David's book included recipes, ""rules"" for an effective dinner system, suggestions for stimulating conversation, a survey of ways different cultures say grace, and ways to include grandparents." 1351 1 Serotiny 1 Serotiny is an ecological adaptation exhibited by some seed plants, in which seed release occurs in response to an environmental trigger, rather than spontaneously at seed maturation. 1352 1 Serotiny 1 "The most common and best studied trigger is fire, and the term ""serotiny"" is often used to refer to this specific case." 1353 1 Serotiny 1 The term has also been used in the more general sense of plants that release their seed over a long period of time, irrespective of whether release is spontaneous; in this sense the term is synonymous with bradyspory. 1354 1 Serotiny 2 Possible triggers include: 1355 1 Serotiny 2 Some plants may respond to more than one of these triggers. 1356 1 Serotiny 2 "For example, ""Pinus halepensis"" exhibits primarily fire-mediated serotiny, but responds weakly to drying atmospheric conditions." 1357 1 Serotiny 2 "Similarly, Sierras sequoias and some ""Banksia"" species are strongly serotinous with respect to fire, but also release some seed in response to plant or branch death." 1358 1 Serotiny 3 Serotiny can occur in various degrees. 1359 1 Serotiny 3 "Plants that retain all of their seed indefinitely in the absence of a trigger event are ""strongly serotinous""." 1360 1 Serotiny 3 "Plants that eventually release some of their seed spontaneously in the absence of a trigger are ""weakly serotinous""." 1361 1 Serotiny 3 "Finally, some plants release all of their seed spontaneously after a period of seed storage, but the occurrence of a trigger event curtails the seed storage period, causing all seed to be released immediately; such plants are essentially non-serotinous, but may be termed ""facultatively serotinous""." 1362 1 Serotiny 4 In the southern hemisphere, fire-mediated serotiny is found in angiosperms in fire-prone parts of Australia and South Africa. 1363 1 Serotiny 4 "It is extremely common in the Proteaceae of these areas, and also occurs in other taxa, such as ""Eucalyptus"" (Myrtaceae) and even exceptionally in ""Erica sessiliflora"" (Ericaceae)." 1364 1 Serotiny 4 "In the northern hemisphere, it is found in a range of conifer taxa, including species of ""Pinus"", ""Cupressus"", ""Sequoiadendron"", and more rarely ""Picea""." 1365 1 Serotiny 5 Since even non-serotinous cones and woody fruits can provide protection from the heat of fire, the key adaptation of fire-induced serotiny is seed storage in a canopy seed bank, which can be released by fire. 1366 1 Serotiny 5 The fire-release mechanism is commonly a resin that seals the fruit or cone scales shut, but which melts when heated. 1367 1 Serotiny 5 "This mechanism is refined in some ""Banksia"" by the presence inside the follicle of a winged seed separator which blocks the opening, preventing the seed from falling out." 1368 1 Serotiny 5 Thus the follicles open after fire, but seed release does not occur. 1369 1 Serotiny 5 As the cone dries, wetting by rain or humidity causes the cone scales to expand and reflex, promoting seed release. 1370 1 Serotiny 5 The seed separator thus acts as a lever against the seeds, gradually prying them out of the follicle over the course of one or more wet-dry cycles. 1371 1 Serotiny 5 The effect of this adaptation is to ensure that seed release occurs not in response to fire, but in response to the onset of rains following fire. 1372 1 Serotiny 6 The relative importance of serotiny can vary among populations of the same plant species. 1373 1 Serotiny 6 "For example, North American populations of lodgepole pine (""Pinus contorta"") can vary from being highly serotinous to having no serotiny at all, opening annually to release seed." 1374 1 Serotiny 6 Different levels of cone serotiny have been linked to variations in the local fire regime: areas that experience more frequent crown-fire tend to have high rates of serotiny, while areas with infrequent crown-fire have low levels of serotiny. 1375 1 Serotiny 6 Additionally, herbivory of lodgepole pines can make fire-mediated serotiny less advantageous in a population. 1376 1 Serotiny 6 "Red squirrels (""Sciurus vulgaris"") and red crossbills (""Loxia curvirostra"") will eat seeds, and so serotinous cones, which last in the canopy longer, are more likely to be chosen." 1377 1 Serotiny 6 Serotiny occurs less frequently in areas where this seed predation is common. 1378 1 Serotiny 7 Pyriscence can be understood as an adaptation to an environment in which fires are regular, and in which post-fire environments offer the best germination and seedling survival rates. 1379 1 Serotiny 7 In Australia, for example, fire-mediated serotiny occurs in areas that are not only prone to regular fires, but also possess oligotrophic soils and a seasonally dry climate. 1380 1 Serotiny 7 This results in intense competition for nutrients and moisture, leading to very low seedling survival rates. 1381 1 Serotiny 7 The passage of fire, however, reduces competition by clearing out undergrowth, and results in an ash bed that temporarily increases soil nutrition; thus the survival rates of post-fire seedlings in greatly increased. 1382 1 Serotiny 7 Furthermore, releasing a large number of seeds at once, rather than gradually, increases the possibility that some of those seeds will escape predation. 1383 1 Serotiny 7 Similar pressures apply in Northern Hemisphere conifer forests, but in this case there is the further issue of allelopathic leaf litter, which suppresses seed germination. 1384 1 Serotiny 7 Fire clears out this litter, eliminating this obstacle to germination. 1385 1 Serotiny 8 Serotinous adaptations occur in at least 530 species in 40 genera, in multiple (paraphyletic) lineages. 1386 1 Serotiny 8 Serotiny likely evolved separately in these species, but may in some cases have been lost by the related non-serotinous species. 1387 1 Serotiny 9 "In the genus ""Pinus"", serotiny likely evolved because of the atmospheric conditions during the Cretaceous period." 1388 1 Serotiny 9 The atmosphere during the Cretaceous had higher oxygen and carbon dioxide levels than our atmosphere. 1389 1 Serotiny 9 Fire occurred more frequently than it does currently, and plant growth was high enough to create an abundance of flammable material. 1390 1 Serotiny 9 "Many ""Pinus"" species adapted to this fire-prone environment with serotinous pine cones." 1391 1 Serotiny 10 A set of conditions must be met in order for long-term seed storage to be evolutionarily viable for a plant: 1392 1 Taricha 1 The genus Taricha consists of four species of highly poisonous newts in the family Salamandridae. 1393 1 Taricha 1 Their common name is Pacific newts, sometimes also western newts or roughskin newts. 1394 1 Taricha 1 The four species within this genus are the California newt, the rough-skinned newt, the red-bellied newt, and the sierra newt, all of which are found on the Pacific coastal region from southern Alaska to southern California, with one species possibly ranging into northern Baja California, Mexico. 1395 1 Taricha 2 "Genus ""Taricha"" contains the following species:" 1396 1 Taricha 2 The rough-skinned newt and the California newt are very similar in appearance, and it can be extremely difficult to differentiate between the species. 1397 1 Taricha 2 Both are light-brown to black on the upper body and orange to yellow on the underbelly. 1398 1 Taricha 2 They have granulated skin, and they may grow to a length of eight inches. 1399 1 Taricha 2 However, rough-skinned newts have small eyes with dark lower eyelids, while California newts have large eyes and light lower eyelids. 1400 1 Taricha 2 Also, rough-skinned newts' upper teeth form a V shape, while those of the California newt form a Y shape, but this is difficult to ascertain on a living specimen. 1401 1 Taricha 3 The red-bellied newt is brown on the upper body with a red underbelly, has grainy skin, and grows to between 5.5 and 7.5 in. 1402 1 Taricha 3 It can be distinguished from other coastal newts, not only by its red belly, but also by the lack of yellow in its eyes. 1403 1 Taricha 3 Breeding males develop smooth skin and a flattened tail. 1404 1 Taricha 4 "Taricha"" spp." 1405 1 Taricha 4 eat a diet largely consisting of invertebrates, though adults will also take fish and amphibian eggs. 1406 1 Taricha 4 Most predators associate bright colors with poison (called aposematism), so if attacked, the newt will take up a defensive position, showing off the bright underbelly. 1407 1 Taricha 4 Newts of this genus are primarily nocturnal, and may be either fully aquatic or semiaquatic. 1408 1 Taricha 4 None are fully terrestrial as they must enter the water to breed. 1409 1 Taricha 4 "Juvenile newts, which are known as ""efts"", are primarily terrestrial until they reach sexual maturity." 1410 1 Taricha 5 "All species within the genus ""Taricha"" possess the biotoxin tetrodotoxin." 1411 1 Taricha 5 However, toxicity varies between species and between populations within a species. 1412 1 Taricha 5 In general, the rough-skinned newt is the most toxic species. 1413 1 Taricha 5 Their populations in northern Oregon are more toxic than those from California and Washington. 1414 1 Taricha 5 Those on Vancouver Island, in British Columbia, possess little or no tetrodotoxin. 1415 1 Taricha 6 "Taricha"" newts can be lethal to humans if ingested, and at least one human fatality occurred in Oregon from eating a rough-skinned newt." 1416 1 Taricha 6 "Eastern newts of the genus ""Notophthalmus"" (= ""Diemictylus"" of earlier authors) also secrete tetrodotoxin, but in lesser amounts." 1417 1 Taricha 6 "When handling ""Taricha"" specimens, the toxins should not be allowed to come in contact with broken skin or mucous membranes." 1418 1 Taricha 6 "Proper hand washing after handling should prevent any problems with ingestion of tetrodotoxin (as well as infection from ""Salmonella"" which newts may carry), though some individuals are known to be allergic to skin contact with the toxin." 1419 1 The Earth Institute 1