Pollution problems have continuous increase around the world because of increased population growth and associated industrial activities. The presence of high levels of pollutants in nature is of major concern because of their potential threats to both human and ecosystem health. Pollution poses a grave danger for not only in man but the entire life on this planet. The foremost thing which deserves to be done is to educate the people that the atmosphere is not meant for dumping all kinds of pollution. Importance of preserving the health and welfare of man, protection of plant and animal life, prevention of damage to property, ensuring visibility for safe air and ground transport, and maintenance of cleaner atmospheric environment should also be explained. Pollution is one of the larger mirrors of man's follies, and a challenge we need to overcome to see a tomorrow. . This book provides a detailed knowledge in various aspects of pollution. It will be useful for the graduate and post graduate students of life science and environmental science as a basic reference.