The new edition of this textbook introduces the basic chemical concepts underlying a sound understanding of environmental science and ecology. Chapters contain explanations of fundamental chemical principles and include illustrations of real examples from the environment. From an introduction to atomic and molecular structure, the text progresses to more advanced areas within physical, inorganic, organic, and analytical chemistry. Important new sections include an introduction to the concepts of biogeochemical cycling, and the role environmental chemistry plays with respect to climate, notably global warming and ozone depletion. The case studies have been updated, and a section about toxic chemicals has been added. While the primary aim is to satisfy the needs of the nonchemist, the text also serves to introduce environmental precepts to chemists who wish to apply their expertise to environmental issues. This volume is especially suitable for undergraduates in environmental science, environmental chemistry and ecology.