Updated to reflect the most recent exams, this manual has been thoroughly revised to reflect the most recent AP Environmental Sciences exam. It covers all important environmental science concepts and also provides an overview of the exam format, test-taking strategies, and two full-length practice exams answers thoroughly explained. Test topics reviewed include the earth and atmosphere, global water resources, ecosystems and cycles, population, global changes, pollution, and more. Current laws and regulations along with case studies are presented for each topic.