Clean Air Protection Problems at National Parks and Wilderness Areas: Hearing Before the Environment, Energy, and Natural Resources Subcommittee of the Committee on Government Operations, House of Representatives, One Hundred Third Congress, Second Session, April 29, 1994
United States. Congress. House. Committee on Government Operations. Environment, Energy, and Natural Resources Subcommittee
U.S. Government Printing Office, 1995 - Air - 212 pages
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1990 amendments acid rain Administrator adverse impact determination agencies Air Act Amendments air pollution air quality related airport Appalachian Mountain appeal assessment BACKIEL Canyon Visibility Transport Chairman CHRISTIANO class I areas Clean Air Act Colorado Plateau Commission's Committee contribute control technology develop East ecosystems effects efforts EPA’s establish existing sources Federal land managers ﬁrst Forest Service FRAMPTON funding Grand Canyon Visibility HADDOW impairment in class implementation improve visibility issue kilometers LEARY levels models National Park Service national visibility goal Natural Resources Navajo Generating Station NICHOLS nitrogen oxides NOX emissions offsets ozone P.O. Box parks and wilderness percent permit applications protect visibility PSD program quality related values recommendations reduce regional haze regulations regulatory require SHAVER Shenandoah National Park signiﬁcant SOUBY source review STEINHARDT strategy Subcommittee sulfate sulfur dioxide SYNAR testimony Virginia visibility impairment visibility protection Visibility Transport Commission wilderness areas Zirkel Wilderness