Bringing together contributions from diplomats, UN agency officials, lawyers and academics, this book provides insight into the evolution of international environmental law, diplomacy and negotiating techniques. Based on first-hand experiences and extensive research, the chapters offer a blend of practice and theory, history and analysis, presenting a range of historical episodes and nuances and drawing lessons for future improvements to the processes of law-making and diplomacy. The book represents a synthesis of the most important messages to emerge from the annual course on Multilateral Environmental Agreements, delivered to diplomats and negotiators from around the world for the last decade by the University of Eastern Finland and the United Nations Environment Programme. The book will be of interest as a guide for negotiators and as a supplementary textbook and a reference volume for a wide range of students of law and environmental issues.