This Handbook examines how social networks underpin environmental change, exploring issues of collaboration, learning and social influence in environmental contexts. It provides an accessible framework for understanding the complex interplay between social dynamics and environmental problems, highlighting how social networks can shape and potentially solve pressing global challenges. Bringing together diverse case studies, leading specialists outline the role of social networks in environmental management, policy, risk, disasters and climate adaptation. They shed light on seed circulation and regional trade networks, and analyze the impact of conservation technology in environmental policy. Chapters address flood planning and the prevalence of post-disaster mental health issues, showcasing best practice in the journey from environmental catastrophe to recovery. They discuss equitable climate-smart architecture, network segregation, power, and the global trade networks driving climate change, as well as local stakeholder networks supporting climate action. The Handbook of Social Networks and the Environment will greatly benefit students and academics in social network analysis, sociology and social theory, environmental sociology, public policy and sustainability studies. Its exploration of the complex social and environmental nexus is also invaluable to public policy officials and practitioners in project and environmental management.