環境政策
Nixon was a late supporter of the conservation movement. Environmental policy had not been a significant issue in the 1968 election, and the candidates were rarely asked for their views on the subject. Nixon broke new ground by discussing environmental policy in his State of the Union speech in 1970. He saw that the first Earth Day in April 1970 presaged a wave of voter interest on the subject, and sought to use that to his benefit; in June he announced the formation of the Environmental Protection Agency (EPA). He relied on his domestic advisor John Ehrlichman, who favored protection of natural resources, to keep him "out of trouble on environmental issues." Other initiatives supported by Nixon included the Clean Air Act of 1970 and the Occupational Safety and Health Administration (OSHA), and the National Environmental Policy Act required environmental impact statements for many Federal projects. Nixon vetoed the Clean Water Act of 1972—objecting not to the policy goals of the legislation but to the amount of money to be spent on them, which he deemed excessive. After Congress overrode his veto, Nixon impounded the funds he deemed unjustifiable.