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Protects human health and welfare with national air quality standards;
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Sets a national visibility goal of no human-caused impairment in Class I areas which were further defined through the 1999 Regional Haze Rule;
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and establishes the Prevention of Significant Deterioration of Air Quality Related Values program that mandates a review by Federal Land Managers of new or major modifications to pollution sources that could affect Class I areas.
Visit http://www.epa.gov/air/caa/ to read the Clean Air Act.
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