Consists of correspondence, memoranda, testimony, drafts and summaries of legislation, fact sheets, press releases, notes, research materials, and news clippings documenting the Sierra Club's ongoing efforts to influence legislation concerning clean air and water, the protection of national parks, wilderness areas, and endangered species, and energy and water resources development. Also documents issues and campaigns taking place during the presidential administrations of Richard Nixon, Gerald Ford, Jimmy Carter, and Ronald Reagan such as the Trans-Alaska Pipeline and proposed natural gas pipelines; the offshore oil industry and oil and gas leases on public lands; strip-mining; the Roadless Area Review and Evaluation (RARE II) legislation; hazardous waste and Superfund legislation; and the controversial tenure of and successful effort to replace U.S. Secretary of the Interior James Watt. Subject files from the Political Program and Environmental Quality Department; files on the California Desert Protection Act (circa 1987-1995).