The book covers various chapters in air and water pollution. In air pollution section, the topics like atmosphere, air pollution and pollutant in general, some important gaseous pollution, noise pollution and air pollution control technologies have been included. Water pollution section covers hydrosphere, various types of water pollutants, their transport in the environment and effect on environmental health, and prevention and control of water pollution. A special chapter on the legal aspects of environmental pollution in India has been accommodated. This book should be of considerable use as a text book to both undergraduate and pos-graduate students of Environment Science and Pollution ecology.