Bringing together many of the world’s leading experts, this volume is a comprehensive, state-of-the-art review of climate change science, impacts, mitigation, adaptation, and policy. It provides an integrated assessment of research on the key topics that underlie current controversial policy questions. The first part of the book addresses recent topics and findings related to the physical–biological earth system, including air pollution–climate interactions, climate interactions with the carbon cycle, and quantitative probability estimates of climate sensitivity and change. The next part of the book surveys estimates of the impacts of climate change for different sectors and regions, describes recent studies for individual sectors, and examines how this research might be used in the policy process. The third part examines current topics related to mitigation of greenhouse gases and explores the potential roles of various technological options that would limit greenhouse-gas emissions and enhance terrestrial carbon sinks. The last part focuses on policy design under uncertainty. Dealing with the scientific, economic, and policy questions at the forefront of the climate change issue, this book will be invaluable for graduate students, researchers, and policymakers interested in all aspects of climate change and the issues that surround it.