Nine specialists contribute to this text examining the possible impact of climate change on seven regions of the U.S. The major points of inquiry include possible outcomes in each region if the country experiences a few degrees of warming, regional effects if climatic changes turn out to be more substantial, possible variation in the effects from one region to another, and the possibility that some regions may be more vulnerable than others. The study focuses on five market sectors—agriculture, forestry, water resources, energy, and coastal resources—and includes discussion of efficient adaptation responses. Based on research funded by the Electric Power Research Institute and the California Energy Commission, this text would interest those in climate change, and individuals interested in studying impact methodologies.