Environmental policy and the contours of environmental law -- Environmental regulation, constitutional law, and administrative law -- The regulation of air pollution : the Clean Air Act -- The regulation of water pollution : the Clean Water Act -- The regulation of hazardous wastes : RCRA and CERCLA -- The protection of endangered and threatened species : the Endangered Species Act -- Introducing environmental concerns to government decision making : NEPA -- Methods of enforcement -- Regulation of the environment at the international level