Planet Earth is heating up, and so is the debate over why our climate is changing and what it means for the future of our energy sources, of our cities, of our children. Now TIME explores the science of global warming in an illuminating, beautifully illustrated book that ranges from polar ice caps to equatorial rainforests. Here are the scientists who are working to measure and counter the warming trend; here are the world's most endangered habitats and creatures; here are various scenarios for the future. Separating truth from fantasy, TIME brings a cool eye to one of today's hottest issues. Updated and revised from the 2007 classic, this edition will be packed with new information and learning from the past five years.