The new edition of this classic coursebook has been extensively revised with a view to maximizing student learning and engagement. Highlights include a completely rewritten Part I of the book. Four new chapters introduce students to international law by examining the legal dimensions of several real-world environmentally related conflicts, including the Bering Sea Fur Seal arbitration, the dispute over whaling in the Southern Ocean, the Rainbow Warrior incident, the Trail smelter arbitration, and the negotiation of the Convention on Long-range Transboundary Air Pollution. Students learn the basics of international law by studying how it is used by states in the resolution of disputes and how it is developed by states to address new problems. The second part of the book continues the tradition of using problems to explore various topics in international environmental law. Significant changes include greater reliance on primary legal materials (treaties, resolutions, etc.) as readings and the addition of introductory overviews to help students gain basic knowledge of an area of law before tackling the complexities presented by the problems.