A clarification of Naess's ?depth metaphor? is offered. The relationship between Naess's empirical semantics and communication theory and his deep ecology approach to ecophilosophy (DEA) is developed. Naess's efforts to highlight significant conflicts by eliminating misunderstandings and promoting deep problematizing are focused upon. These insights are used to develop the implications of the DEA for environmental policy. Naess's efforts to promote the integration of science, ethics, and politics are related to the National Environmental Policy Act (NEPA). The action?oriented aspect of (...) deep ecology, its focus upon redirecting environmental policy, is also highlighted. The discussion is framed by Brian Norton's contention, in Toward Unity Among Environmentalists, that Naess's deep/ shallow distinction is not consequential. In the final section some of the uniqueness of Naess's contribution is intimated, the ?sturdiness? of deep ecology's foundation is considered, and directions for future theoretical and practical contributions are suggested. As will be observed, Naess has many important insights to offer, but some vexing issues persist. (shrink)