For introductory courses in Environmental Science, Environmental Studies, and Environmental Biology. By emphasizing the memorable themes of science, sustainability and stewardship, the Eleventh Edition of this popular textbook helps students understand the science behind environmental issues and what they can do to build a more sustainable future. This thorough revision features updated content, graphics, and photos, plus the addition of new co-author Dorothy Boorse. A wealth of effective new online resources is also available through the new MasteringEnvironmentalSciencea online assessment and tutorial system, including five intriguing Video Field Trips.