Global environmental negotiations have become central sites for studying the interaction between politics, power and environmental degradation. Through introducing the concept of agreement-making, this book challenges what constitutes the sites, actors and processes of negotiations beyond conventional approaches and provides a critical, multidisciplinary and applied perspective reflecting recent developments, such as the increase of actor diversity and the digitalization of global environmental meetings. It provides a step-by-step guide to the study of global environmental negotiations, using accessible language and illustrative examples from different negotiation settings, including climate change, biodiversity, and ocean protection. The book identifies and illustrates how diverse methods can be applied to research the actors, sites, processes and order-making of agreement-making for the purpose of advancing the study of multilateral environmental negotiations. Through reflection boxes, illustrative examples and tips from advanced scholars and early career researchers, the book provides practical guidance and methodological tools for students, researchers and practitioners participating in global environmental agreement-making.