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Protecting Parks and Wilderness from Nearby Air Pollution Sources
GENERAL ACCOUNTING OFFICE WASHINGTON DC RESOURCES COMMUNITY AND ECONOMIC DEVELOPMENT DIV
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The PSD program was authorized, in part, to ensure that new development would not cause any significant deterioration of air quality in relatively clean air areas. Although the Clean Air Act established minimum air quality standards for the entire country, the PSD program went beyond this to maintain the quality of air that was already cleaner than required by the standards. The act gave the highest level of protection to 158 national parks and wilderness areas, designating them Class I areas.
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