The most widely adopted text in the field, this comprehensive, multidisciplinary casebook analyzes the major treaty regimes (with an expanded climate chapter), as well as customary law principles. It emphasizes the dynamic nature of the law-making process, including global environmental diplomacy and the expanding role of non-state actors, including scientists, NGOs, and business. It presents the binding norms of international environmental law, and explains how international cooperation facilitates and strengthens global environmental governance through setting national priorities, coordinating bilateral and multilateral science, financing, technology sharing, and capacity building.