This book explores the chemical nature of air pollutants and their profound effects on human health and the environment. It provides a detailed examination of major pollutants such as particulate matter, nitrogen oxides, sulfur dioxide, and volatile organic compounds. The book discusses the sources of these pollutants and their chemical transformations in the atmosphere. Mitigation strategies and policies for controlling air pollution are thoroughly analyzed. It is an essential reference for students, scientists, and policymakers working in environmental chemistry and public health.