Natural science can tell us what causes climate change. Engineering gives us the technologies we need to curb climate change. Sociology can explain why, despite having the knowledge and know-how, very little is being done about it. Environmental sociology explores the nexus of human and environmental systems. People exist on Earth and require its resources for survival, but they also exist in constructed social systems that constrain and guide human behavior. Although human society is socially constructed, it has a reality of its own, which exists alongside a material world of finite resources. This course provides an overview of environmental sociology, its findings, theories and thinkers, who seek to understand the dynamic interrelationship of human society and the natural world.