Analysis of information sources in references of the Wikipedia article "Rocky Mountain National Park" in English language version.
According to the "Polluted Parks" report from the National Parks Conservation Association (NPCA), 97% of national parks suffer from significant or unsatisfactory levels of air pollution… NPCA listed Rocky Mountain National Park (RMNP) as the ninth most-polluted U.S. national park, specifically looking at parks with 'unhealthy air.'… According to the National Park Service, vehicles, power plants, agriculture, fire, oil, gas, and more contribute to air pollution in RMNP. NPCA also reports that the boom in oil and gas production in Weld County has adversely affected RMNP, causing the park to fall out of compliance with the Clean Air Act.
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