Types of Air Pollution
Air pollution has been a public issu
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Air pollution has been a public issue for decades and has been identified as having numerous health consequences. It has also spawned a good deal of effort to curb emissions from automobiles and factories and to maintain the forests and other natural entities which help preserve a good atmosphere. Air and water pollution have probably been the primary concerns which originally energized a number of groups in society to try to do something about the problem of pollution. Among the groups fighting to stop air pollution were the Sierra Club, the Audubon Society, scientific groups, Zero Population Growth, and other citizen-led groups. While no one was specifically agitating for pollution as such, business interests fought to prevent regulations they considered excessive and costly, such as regulations directed at reducing emissions from factories or calling for a redesign of automobiles to make them less polluting. Outdoor air pollution gets the most attention, but more recently, there has been much attention given to interior air pollution from a variety of sources, including the pollution from outdoors, radon in cellars, and various structural materials and coverings which may cause allergic reactions in some people.Most air pollution is emitted from the exhausts of automobiles or from the burning of fossil fuels by industry. Even clean air contains many substances other than oxygen and nitrogen, its major constituents, including rar
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re still in use elsewhere and account for 25 percent of global CFC use. CFCs are released by spray cans, discarded or leaking refrigeration and air conditioning equipment, and the burning of plastic foam products. CFCs stay in the atmosphere from 22 to 111 years, moving up to the stratosphere gradually over several decades. Under high energy ultra violet (UV) radiation, they break down and release chlorine atoms, which in turn speed up the breakdown of ozone (O3) into oxygen gas (O2). Chlorofluorocarbons are also known as Freons and constitute greenhouse gases that contribute to global warming (Socha).
The nature of air pollution changes all the time as different pollutants are emitted in different concentrations, and the geography of pollution also changes all the time. For instance, Houston, Texas was recently cited as the smog capital of the nation when it suffered 44 days of ozone levels that exceeded national health standards, one more day than Los Angeles (Whitman and Bryce 28).
Los Angeles was once considered the smog-capital of the nation, but more recently, Los Angeles is not even the most smog-ridden city in Southern California. AQMD officials and environmentalists warn that Southern California is still at leas
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Approximate Word count = 3108
Approximate Pages = 12 (250 words per page)
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