Environment, Ninth Edition weaves the central themes of Systems and Sustainability throughout the text to help students understand the connection between the core concepts of Environmental Science and their daily lives. The 9th edition features a rich collection of current case studies and in-text examples, highlighting local and regional issues which provide students with the science and tools to understand, apply, and think critically about environmental science. It also provides instructors a powerful tools to assess individual students progresses well as the class as a whole.