United States Government Publishing Office publisher pbl distributor dst United States Government Accountability Office Resources, Community, and Economic Development Division author aut Government Organization text government publication eng GAOREPORTS Legislative Agency Publications gao legislative 2010-08-12 U.S. Government Printing Office 1994-04-29 monographic deposited born digital GA 1.13:T-RCED-94-102 https://www.govinfo.gov/app/details/GAOREPORTS-T-RCED-94-102 P0b002ee18039f875 f:trc94102 DGPO 2010-08-12 2011-03-24 GAOREPORTS-T-RCED-94-102 machine generated eng fdlp REPORT GAOREPORTS-T-RCED-94-102 T-RCED-94-102 Air pollution control National parks Environmental law Environmental monitoring Pollution monitoring Industrial facilities Industrial pollution Federal property management Wilderness areas Federal/state relations EPA Prevention of Significant Deterioration Program Grand Canyon National Park (AZ) Shenandoah National Park (VA) Great Smoky Mountains National Park EPA Mohave Project Testimony RCED The Clean Air Act Amendments of 1977 set a national goal of correcting and preventing pollution that limits visibility in more than 150 national parks and wilderness areas. Seventeen years later, however, visitors to these areas are unable to enjoy spectacular views, such as those at the Grand Canyon, because of interference from air pollution. In view of the limited success of the Prevention of Significant Deterioration program and other efforts in controlling air pollution and in light of increasing scientific evidence that regional sources are major contributors to impaired visibility, GAO believes that some type of regional approach is needed to address the problem. EPA has indicated its intention to wait for more information before deciding whether to issue regional haze regulations. It is unclear, however, when that information will be available given reductions in the number of monitoring sites in the national parks and wilderness areas and the fact that only one visibility transport commission has been established. At the same time, the National Research Council and the Park Service have both said that current scientific knowledge is adequate and control technologies are available to take regulatory steps to improve visibility. Accordingly, GAO recommends that the EPA Administrator begin developing a control strategy for overcoming visibility impairment caused by regional sources. https://www.govinfo.gov/content/pkg/GAOREPORTS-T-RCED-94-102/html/GAOREPORTS-T-RCED-94-102.htm GAO/T-RCED-94-102 https://www.govinfo.gov/app/details/GAOREPORTS-T-RCED-94-102 Testimony GAO/T-RCED-94-102; Air Pollution: Regional Approaches Are Needed to Protect Visibility in National Parks and Wilderness Areas; Air pollution control National parks Environmental law Environmental monitoring Pollution monitoring Industrial facilities Industrial pollution Federal property management Wilderness areas Federal/state relations EPA Prevention of Significant Deterioration Program Grand Canyon National Park (AZ) Shenandoah National Park (VA) Great Smoky Mountains National Park EPA Mohave Project