An updated and accessible account of what science knows about climate change, incorporating the latest scientific findings and policy initiatives. Most of us are familiar with the term climate change but few of us understand the science behind it. We don't fully comprehend how climate change will affect us, and for that reason we might not consider it as pressing a concern as, say, housing prices or unemployment. This book explains the scientific knowledge about global climate change clearly and concisely in engaging, nontechnical language, describes how it will affect all of us, and suggests how government, business, and citizens can take action against it. This completely revised and updated edition incorporates the latest scientific research and policy initiatives on climate change. It describes recent major legislative actions, analyzes alternative regulatory tools including new uses of taxes and markets, offers increased coverage of China and other developing nations, discusses the role of social media in communicating about climate change, and provides updated assessments of the effects of climate change. The book first explains the basic scientific facts about climate change and its global impact. It discusses the nature of scientific consensus and the strong consensus of mainstream science on climate change. It then explores policy responses and corporate actions in the United States and the rest of the world, discusses how the communication of climate change information by journalists and others can be improved, and addresses issues of environmental justice—how climate change affects the most vulnerable populations and regions. We can better tackle climate change, this book shows us, if we understand it.