Global environmental negotiations have become central sites for studying the interaction between politics, power, and environmental degradation. 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 digitalisation 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. It introduces the concept of 'agreement-making' to broaden understanding of what is studied as a 'site' of negotiation, illustrating how diverse methods can be applied to research the actors, processes, and order-making. It provides practical guidance and methodological tools for students, researchers and practitioners participating in global environmental agreement-making. One of a series of publications associated with the Earth System Governance Project: www.cambridge.org/earth-system-governance.