### condition | pollution:

Air pollution
* Most air pollution causes cardiovascular problems
  - illnesses
* Most air pollution comes from other sources
* Most air pollution is invisible
  - the result of some kind of energy production or consumption
* Most air pollution leads to diseases
  - respiratory diseases
  - made by humans today is because of transportation
* Some air pollution causes acid rain
  - cancer
  - lung cancer
  - precipitation
  - changes over decades
  - is natural and has always been a part of the earth's history
  - leads to accumulation
* affects everyone's health
  - many aspects of our environment and economy, but most importantly, our health
  - rainfall because it contains large amounts of microscopic dust particles
  - the lungs, the heart and other parts of the body
* becomes a worldwide problem when local pollution moves away from where it came from.
* can accelerate aging and decay of historic building materials
  - actually cuase the heart to act abnormally
* can also be detrimental to human health
  - contribute to diseases like bronchitis, emphysema, and cancer
  - curb vegetation growth and reduce crop yields
* can also damage masonry on buildings, cause acid rain and produce smoke and odour
  - the environment and property
  - irritate sinus linings
* can be a problem in large built up areas, where many people live
  - indoors, too
  - detrimental to wildlife and ecosystems in the same way
  - either outdoor pollution or indoor pollution
  - especially harmful to people with lung disease, including asthma
  - harmful to people, animals, plants, and structures
  - man-made or naturally occurring
  - wide-ranging as well as persistent
* can cause diseases and harm crops
  - health problems
  - severe human health and environmental impacts
  - visible symptoms or reduce crop yield without other evidence of disease
  - water pollution
* can damage buildings, monuments, statues, and other structures
  - exacerbate respiratory problems
  - have both man-made and natural sources
  - impact people s health
  - interfere with the workings of the lungs, heart and other organs
  - irritate the eyes, throat and lungs
  - kill
  - lead to nitrate in rainfall
* can make asthma and allergy symptoms worse
  - it harder for people with asthma and other respiratory diseases to breathe
  - respiratory diseases, such as, asthma and pneumonia worse
  - sinus symptoms much worse
  - mess up a sunset
  - result from many various sources
  - seriously reduce visibility, making the job of watching difficult at times
  - significantly worsen asthma
  - trigger asthma attacks
* causes a major threat for the future and habitability of our environment
  - crop damage even at levels below the current, legal standard
  - health problems, as well as structural and crop damage
  - heath hazards, and decreases food production capacity
  - illness, lost mountain visibility and climate disruption
  - lung and other respiratory diseases in children
* chief cause of hospital admissions among children and senior citizens.
* comes from a number of sources
  - both manmade and natural sources
* comes from many different sources
  - motor vehicles, industry and many other everyday activities
  - our cars, factories and consumer products
  - power plants, factories, automobiles, lawn mowers and many other sources
  - several different sources in Ontario
* comes in many different forms
* complex problem that affects almost everyone.
* condition that was never thought to be a problem in many communities.
* consists of solid particles and gases.
* contains ozone, nitrogen dioxide, sulfur dioxide, and several different hydrocarbons.
* continues to be out of control especially in developing countries.
* contributing factor to the deterioration the historic buildings.
* determines the state of health of our forests.
* does millions of dollars worth of damage to agricultural crops.
* gets the most attention because of the potential impacts on neighboring states.
* harms the and circulatory systems
* has a enormous effect on public health
  - major impact on the productivity and efficiency of both people and nature
  - more significant negative effect of males than on females
  - direct impacts on human health and the state of the living environment
  - global as well as local effects
  - human health impacts, environmental impacts, economic costs
  - many sources
  - numerous health effects
  - similar effects
  - touched every part of the Earth, acid rain has as well
* huge public health problem.
* hurts everyone.
* includes dust, vapours, ash and odours
  - odours and emissions from commercial and industrial premises
* infects the environment and threatens the health of all who inhabit the earth.
* is actually a result of a few chemical reactions
  - harmful substances in the atmosphere, which damages the environment
* is also a concern
  - problem in urban centers due to emissions from industry and transportation
  - extremely low when compared to the developed countries
* is an example of residuals from manufacturing
  - important public health problem in most cities of the developing world
  - associated with a variety of serious health and environmental problems
  - at crisis point in many major cities
  - blamed for the increasing heat
  - by far the most harmful form of pollution in our environment
* is caused by a number of different types of pollutants
  - burning coal, oil, gasoline and natural gas
  - lots of different pollutants
  - the build-up of harmful gases and particles in the air
  - largely by motor vehicles
  - causing many problems, most of the pollution comes from industry and automobiles
  - composed of particulate matter, sulfur dioxide, and nitrogen oxides
  - created by burning
  - currently a big issue, due to the amount of waste emitted by heavy industries
  - described to the public in four bands low, moderate, high and very high
  - distributed across a wide range of spatial scales
  - down in almost every important category
  - especially damaging to young children
  - estimated to contribute about a quarter of all the nitrogen that enters the Bay
* is everyone's concern
  - generated by the dust from bulldozing and transport activities
  - influenced by wind, weather, and topography
* is known to exacerbate asthma and be a trigger for asthma attacks in children
  - trigger or aggravate asthmatic symptoms
  - now almost entirely a result of vehicle mevements
  - obvious in many large cities
  - of most concern where they live
* is one of the biggest concerns among pollution researchers
  - more obvious forms of pollution
* is particularly dangerous for the very young and the elderly
  - to animals when in form of the acid rain
  - harmful to young children and the elderly
  - proven to cause stress
  - reduced by using undyed fuels because they contain less sulfur
  - reported in the daily news, like the weather
  - supposedly bad enough to choke babies
  - the accumulation in the atmosphere of substances that endanger human health
* is the contamination of air by pollutants
  - the discharge of harmful substances
  - the air by things like fuel, exhaust, and smoke in the air
  - inevitable consequence of neglect
  - most elusive of all routes of chemical exposure
  - presence in the atmosphere of harmful gases, liquids, or solids
  - wasteful, damages the environment, and jeopardizes human health
* kills more people every year than drunk drivers or homicides
  - three million more
* known but so far unquantified source of marine pollution.
* large number of gases, droplets and particles that reduce the quality of the air.
  - poor air quality, which has a range of impacts on both humans and wildlife
* major contributor to lung disease and a serious threat to public health
  - diseases such as asthma and emphysema
* makes life less healthy for humans and other species.
* persistent problem.
* poses a serious threat to the forest eco system and to the growth of forests.
* problem everywhere in the world
  - in a lot of big cities
* problem in many areas
  - of areas of the United States
* proven cause in several lung ailments, from asthma to emphysema.
* public health issue.
* raises the risk of death and disease.
* real menace to our health and life.
* reduces the lung's ability to defend itself.
* refers to contamination of the air by harmful gases or particles
  - the presence of foriegn substances that harm plants, animals, and property
* remains a major problem, despite dramatic reductions in individual auto emissions
  - source of health problems in California
  - problem in many U.S. cities
  - one of the most complex environmental health issues of our time
* serious environmental and health problem.
* serious problem in Mexico City
  - which affects everyone
  - threat to our health
* significant contributor to lung disease, a leading cause of death in America.
* source of chemical contaminants.
* takes many forms.
* threatens human health
  - public health and welfare on a large scale
  - the health of human beings and other living things on our planet
* trickier problem, since it is only indirectly related to climate change.
* weakens white pine trees.
* well-known trigger for asthmatic children.
* world-wide concern today.
+ Air pollution, Air pollution
  * Air pollution is a problem everywhere in the world. Local air pollution usually affects big cities. Air pollution becomes a worldwide problem when local pollution moves away from where it came from. For example, winds carry air pollution made in the middle of the western part of the United States to Canada, like acid precipitation
  - Sources of human-made air pollution
  * Human-made air pollution comes from many things. Most air pollution made by humans today is because of transportation. The gases inside car exhaust, like nitrogen oxide, make smog and acid rain