This book provides an introduction to various aspects of air quality. It contains several chapters dealing with air pollution; a topic of importance for experts in universities and manufacturing plants dealing with environmental problems. The book consists of an analysis of a variety of geographic regions and an evaluation of diverse actions related to these areas. A detailed analysis gives us the reasons for air pollution and its consequences on society. The main sources of air pollutants and their effects on the environment are also discussed. This book provides techniques and tools for measurement of pollution according to each place. Other significant aspects included in the book are the actions of governmental authorities and academic sectors for solving environmental problems resulting from air pollution.