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acid rain acres Administration agency Alaska American animals archeological Arizona Strip bill birds brochure California Canyonlands Canyonlands National Park Cave Chaco City color Colorado concem Congress Conservation Association Dept Director environmental federal fish Forest funds Glacier Bay Grand Canyon Grand Teton grizzly groups habitat hiking Historical Park House humpback whales hunting inholdings Interior Island issue kayak leases ment miles Milford Track million Mono Lake Mountains National Monument National Park Service National Park System natural North NPCA NPCA's Office outdoor P.O. Box Park Service NPS park's parklands Photo photographs plants preserve problems proposed protect public lands rangers Recreation Area Reef region River road rock scenic Senate Send Smoky species Stephen Mather tion tional Park tour trails trapping trip units Utah Valley visitors Washington whales wild wildemess wilderness wildlife write Yellowstone