This course provides a general introduction to international environmental law and policy. We will begin by exploring the economic, political, and legal concepts relevant to international environmental treaty regimes. We will then apply these concepts to concrete regimes designed to deal with specific international environmental problems, such as climate change, ozone depletion, waste trade, fisheries management, and biodiversity and habitat loss. The course focuses principally on the dynamic of treaty negotiations and implementation, as well as the roles played by state and non-state actors.