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Going Green case studies describe actions that are having a positive environmental impact. Some of these actions are by governments, some are by corporations, and some are individual efforts. These case studies are identified by the "Going Green" icon.

Campus Sustainability Initiatives highlight some of the many actions of students and the colleges and Universities they attend that are making a positive environmental impact.

The concept of interrelatedness is a core concept in environmental science. Although this concept can be illustrated in many ways, in this edition we have chosen to use water as a theme. In every chapter appears a water-themed case study, identified by the "water theme" icon. Sometimes the topic of water is also addressed as a heading in the text.

Critical Thinking questions can be found in every chapter. By answering these questions, students will become better at evaluating information, opinions, and arguments, so they can learn to recognize bias, characterize the assumption behind arguments, and avoid jumping to conclusions.