### weather | precipitation | rain:

Acid rain
* Is a form of air pollution which can cause widespread environmental damage.
* Most acid rain affects crops
* Most acid rain has destructive effects
  - harmful effects
  - reaches earth
* Some acid rain affects grind water
* Some acid rain carries metal
* Some acid rain causes death
* Some acid rain contains nitrogen
* Some acid rain is produced by burns
  - coal burns
  - kills trees
* Some acid rain reduces fertilization
  * ' is rain that is unusually acidic. Acid rain can have harmful effects on plants, animals, and on humans. Acid rain is caused when gaseous compounds of ammonium, carbon, nitrogen, and sulphur are released into the atmosphere. The wind carries the gases high into the sky. There the compounds react with the water in the atmosphere and acids are made
* accelerates the weathering process.
* affects aquatic organisms in complex ways
  - carbonate stone buildings and monuments in two ways
  - forest productivity, which in turn raises costs in the forest products industry
  - wildlife and vegetation
* by-product of our industrialized society.
* can affect an entire ecosystem
  - plants also
  - the ecology of lakes and the ground
  - aggravate respiratory ailments such as bronchitis and asthma
* can also damage buildings made of limestone and concrete
  - eat into limestone statues and buildings and corrode metal
* can also increase the weathering of silicate minerals in soils
  - water acidity
  - kill certain essential microorganisms
  - result in human health concerns and damage to buildings
* can be especially harmful to plants and animals
  - extremely harmful to forests, lakes and streams, and humans
  - manmade or occur naturally
* can be very harmful to the environment in many ways
* can cause lakes and forest to dies
  - leaching of important nutrients from the soil
  - magnesium and calcium to be leached from the soil
  - many problems including poor visibility and human health concerns
* can cause marble statues carved long ago to lose their features
  - status carved long time ago to lose their features
  - contribute to high acid levels in water and soil
* can damage building components such as stone, mortar, paint, and metals
  - forests and reduce the productivity of agricultural crops
  - forests, lakes and buildings
* can damage lakes and aquatic life and affect the human respiratory system
  - plants directly
  - plants, animals, soil, water, building materials, and people
  - statues, buildings, plants, crops and forests
  - trees and reduce fish stocks in lakes and streams
* can destroy soil
  - the leaves of plants like in the picture at the left
  - displace nutrients such as calcium and magnesium from the soils
  - effect all parts of our environment, as well as our lives
* can even damage paint on cars and the outsides of houses and buildings
  - eat away at statues and buildings
* can harm ecosystems in a variety of ways
  - other plants in same way it harms trees
  - plant life and actually kill plants
  - plants and alter water ecosystems
* can have harmful effects on plants , animals , and on humans
  - severe effects on vegetation
  - hurt plants and animals, and can make lakes dangerous to swim in or fish in
  - increase the acidity of soil, water and shallow groundwater
* can kill fish, pollute water injure plants, make soil more acidic, and damage buildings
  - water plants, deform fish, and prevent fish eggs from developing
  - react with aluminum in the soil
  - turn limestone into gypsum, a soft mineral that traps dirt
* caused by pollution can also cause soil degradation.
* causes a decrease of microbial activity in the litter and in the soil
  - acidification of rivers and lakes, damages tree foliage and degrades soil quality
  - extensive damage to water, forest, soil resources and even human health
  - the erosion or weathering of limestone
* changes the acidity of soil and water
  - chemistry of lakes and streams, which destroys aquatic life
  - quality of the forest soil, potentially stunting the growth of plants
* comes from polluted clouds
* complicated problem, but it is mainly from air pollution.
* continues to affect our lakes, forests, wildlife and even our health
  - have a serious impact on the forests and on Quebec's maple syrup industry
* contributes to forest decline by removing essential nutrients from forest soils
  - the corrosion of metals and the deterioration of paint and stone
* corrodes metal and stone work making the maintenance of buildings more costly.
* damages forests and causes lakes and streams to become acidic, killing fish
  - many materials, such as marble, limestone, and steel
* damages the delicate ecosystems of lakes and rivers and their plant life
  - leaves of trees
  - waxy layer on the leaves of trees
* degrades forests and fish stocks in lakes.
* depletes forest life.
* describes any form of precipitation with high levels of nitric and sulfuric acids.
* destroys thousands of lakes and forests in the U.S., Canada, and throughout the world.
* does have a harmful effect on aquatic animals.
* eats away the rocks' surfaces.
* enters lakes and streams and can destroy many forms of life.
* falling on water bodies has a direct effect.
* falls into our lakes and forests, where many fish and plants live
  - on nearly one-third of the country
* frequent phenomenon in and around industrial areas.
* general phrase meaning acid falling from the atmosphere.
* generic term that can include acidic fog and acidic snow.
* global problem.
* harms more than aquatic life
  - plants, animals, and fish, and erodes bulding surfaces and national monuments
  - thousands of lakes, rivers, and streams worldwide, killing fish and other wildlife
* has a detrimental effect on plant-life and hence on crop production
  - way of eating away plants, and ruining soil that was otherwise farmable
* has many harmful effects on earth s air and water supply
  - negative repercussions on both humans and the environment
  - effects on plants and vegetables
* has severe effects on the environment and individual ecosystems within it
* has the effect on buildings and monuments
  - same effect on buildings and monuments
  - tremendous effects on the environment
* hastens the deterioration of ancient statues and art throughout the world.
* hits lakes and streams hard.
* impacts on calcium nutrition and forest health.
* increases across North America.
* increases the acidity levels of rivers, lakes and seas
* influences the forests.
* is acid precipitation
* is also harmful to humans
  - the classic problem of transboundary pollution
* is another environmental problem connected with fuel use
  - long-range pollutant influenced by vehicle NOx emissions
  - pollutant that kills the aquatic plants and animals that many fish eat
  - any polluted precipitation, such as rain, snow, fog, sleet, etc
  - at least thirty times more acidic than normal rain
* is caused by natural forces as well as by man and industry
  - sulfur dioxide and nitrogen oxides produced when fuels burn
* is caused by the burning of fossil fuels
  - fuels such as oil and coal
  - emission and atmospheric transport of sulfur and nitrogen pollutants
  - mostly by burning minerals like coal which contain some sulfur
  - primarily by emissions of nitrogen oxides and sulfur dioxide
* is caused when clouds absorb gaseous pollutants
  - gases, such as sulphur dioxide and nitrous oxide are released into the air
  - damaging forests and crops far from the sources and sometimes in a different country
  - formed by the burning of fossil fuels, especially coal, which is high in sulfur
* is formed when certain gases dissolve in rain water to form acids
  - invisible gases are released into the air and mixed with rain clouds
  - harmful rain
  - hazardous to the plant health
  - known as a wet deposit
  - literally acid in rain water
  - made up primarily of nitric and sulfuric acids which fall to Earth as rain and snow
* is one form of pollution that results from burning fossil fuels
  - of the greatest environmental threats to our nation's agriculture
  - type of atmospheric deposition
* is only a problem in urban areas
  - part of a cycle involving industry, people and traffic
* is produced by the burning of fossil fuels that have a high sulfur content
  - when pollutant gases are dissolved and reacted in water
* is rain that becomes polluted as it falls through the atmosphere
  - is more acidic than normal
  - so strong it kills plants,animals, and fish
  - still a very large environmental problem that the world is trying to solve
* is the one of the most important pollution
  - popular term for precipitation that has an abnormally high acid content
  - reason why some forests are being destoryed
* kills off portions of the detritus food chain
  - plants and animals in the bay
* leaches aluminum from soil particles
* lowers the pH of rainfall, runoff, soil water
* major contributor of sulfur in Pennsylvania
  - pollutant in the world today
* occurs when a. carbon dioxide combines with water in the atmosphere
  - atmospheric pollutants become part of clouds and then fall as rain
* plays a role in the mobilization of toxic metals.
* pock mark deep in the surface usually from years of neglect.
* pollution problem because it transcends political boundaries.
* problem in Europe, Canada, and America because of it's widespread environment damage.
* problem that contaminates forests and lakes
  - effects the Great Lakes region
* provokes eyes and skin irritation.
* recent problem, caused by factories and other modern inventions, such as cars.
* reduces the quality and diversity of their invertebrate prey.
* refers to any precipitation, rain or snow, that's more acid than ordinary rain or snow
  - rain or snow that contains heavy concentrations of sulfuric and nitric acids
* result of air pollution from automobiles and coal-burning utilities and factories.
* seems to bring toxic methyl mercury into the food chain.
* soaks into the soil.
* starts out as regular rain.
* term that describes acid that essentially falls out of the atmosphere.
* threatens the planet from fossil fuels.
* weakens and kills plant life, decreasing the food supply for animals that eat the plants.
+ Air pollution, Air pollution, Acid precipitation
  * Acid precipitation is precipitation, like rain, sleet, or snow, that contains acids from air pollution. When fossil fuels are burned, they let out oxides into the air. When these oxides mix with water in the atmosphere, they make acid, which fall as precipitation. Acid precipitation can kill living things, like fish and trees, by making the place where they live too acidic. Acid rain can also damage buildings made of limestone and concrete.