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Air Polutions

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Submitted By djmaki84
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Air pollution threatens the health of human beings and otherliving things on our planet. While often invisible, pollutantsin the aircreate smog and acid rain, cause cancer or other serious healtheffects, diminish the protective ozone layer in the upperatmosphere, and contribute to the potential for world climatechange.
Smog and other types of air pollution can lead to or aggravaterespiratory, heart, and other health problems. It can beparticularly harmful to people with existing lung or heartdisease, the elderly, and the very young. Six of every ten people live in areas that fail to meet one or more federal airquality standards during some portion of the year. However, noteveryone who lives in such areas will have health problems.Level, extent, and duration of exposure, age, individualsusceptibility, and other factors play a significant role in determining whether or not someone will experiencepollution-related health problems. Since polluted air can movefrom one area or region to another, it has the potential toaffect virtually all of us.
Acid rain--caused by sulfur dioxide and nitrogen oxides combiningwith moisture in the air--limits the ability of lakes to supportaquatic life, may damage trees and plants, and erodes buildingsurfaces and national monuments. Pollutants in the air can alsoreduce visibility, obscuring the majestic vistas in nationalparks .
Other air pollutants--called "air toxics"--are known or suspectedto cause cancer or other serious heath effects, such as damage torespiratory or nervous systems. Air toxics include metals,particles, and certain vapors from fuels and other sources.
Some chemicals used in refrigerators and air conditioners last along time if released into the air, rising to the upperatmosphere where they destroy the protective layer. These andother air pollutants (like methane and carbon dioxide) alsocontribute to the suspected

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