This seventh edition of Economics and the Environment welcomes Dr. Stephen Polasky as a co-author, who brings to the text a reworked and stronger focus on natural resource economics and ecosystem services. This book was first published in 1992, as the Rio Earth Summit was concluding. Global warming had been brought to national and global attention only four years prior by James Hansen's famous congressional testimony. The first President Bush would soon sign the UN Framework Convention on Climate Change. At the time, CO2 in the atmosphere stood at 356 parts per million. Twenty one years later, CO2 levels are at 400 parts per million and climbing. Climate change remains front and center, now understood less as an environmental problem than as a challenge to civilization. As in the first edition, global warming remains the topic that launches the book, and provides the framing example for a comprehensive look at environmental economics. With Steve's help, the book now provides a stronger resource and ecosystem processes lens for exploring climate change and other critical environmental issues. The book retains the three interrelated advantages of its earlier incarnations: broad content; pedagogical clarity; and timely, well integrated examples. There are a few significant additions to content, several new end-of-chapter problems and exercises, and updated examples and information throughout.