Environmental issues are of fundamental importance, and a broad approach to understanding the relationship between the human economy and the natural world is essential. In a rapidly changing policy and scientific context, this new edition of Environmental and Natural Resource Economics reflects an updated perspective on modern environmental topics. Now in its fifth edition, this textbook includes enhanced and updated material on energy, climate change, greening the economy, population, agriculture, forests and water--reflecting the greater urgency required to solve the big environmental problems in these areas. It introduces students to both standard environmental economics and the broader perspective of ecological economics, balancing analytical techniques of environmental economics topics with a global perspective on current ecological issues such as population growth, global climate change and "green" national income accounting. Harris and Roach's premise is that a pluralistic approach is essential to understand the complex nexus between the economy and the environment. This perspective, combined with its emphasis on real-world policies, is particularly appealing to both instructors and students. This is the ideal text for undergraduate classes on environmental, natural resource and ecological economics, and postgraduate courses on environmental and economic policy. The companion website features PowerPoint materials and extended, chapter-specific discussion points.