Assuming no prior knowledge of economics, this textbook is intended for interdisciplinary environmental science and management courses. The authors, who have written extensively on the economics of sustainability, combine insights from mainstream economics as well as ecological sciences. Part I explores the interdependence of the modern economy and its environment, while Part II focuses mainly on the economy and on economics. Part III reviews how national governments set policy targets and the instruments used to pursue those targets. Part IV examines international trade and institutions, and two major global threats to sustainability - climate change and biodiversity loss.