Environmental Health: Ecological Perspectives is intended as an environmental health text for both undergraduate and graduate levels. This text provides balanced coverage of how humans are affected by the quality of air, water, and food as well as how humans affect these survival necessities. The evolution and prosperity of the human species has resulted in concerns about pollution, overpopulation, and several other issues that are having a harmful effect on humans and our environment. This knowledge, along with an understanding of the legislation and history of environmental issues, will help students to make positive changes in their behavior and in the world around them.