Definitions and the seven principles of ecology are listed. NEPA expresses or implies all seven. Section 101 is quoted in illustration. CEQ Guidelines implement Sec. 102(2)(C). The reasons for initial delays in implementation are reviewed; these are now largely resolved. The policy involves action through integrating engineering, economics and ecology. Alternative actions must be considered, an...

OBJECTIVES The National Environmental Policy Act and related state laws require many public agencies to analyze and disclose potentially significant environmental effects of agency actions, including effects on human health. In this paper we review the purpose and procedures of environmental impact assessment (EIA), existing regulatory requirements for health effects analysis, and potential bar...