Offering a more concise resource for environmental scientists, the seventh edition explores important environmental issues and shows how to apply this information on the job. It focuses on a systems approach, presenting a framework for thinking about environmental science. The recurring theme of global climate change as a system is integrated throughout the chapters, uncovering both the positive and negative roles that people play in that system. Environmental scientists will also benefit from the revised art program. New photos and illustrations help reinforce concepts and make the material come to life.