This work brings together information and data on atmospheric contaminants; it reviews the sources of contamination, the mechanics of and performance of filtration and dust collection systems, instrumentation for monitoring and control, and the effects of contaminants on people and industrial processes. Pollution and atmospheric contaminants are at the forefront of international concern among environmentalists, research workers, engineers, technologists and the medical profession. The design, installation and use of filtration, ventilation and air-conditioning equipment requires detailed knowledge of the range of types and characteristics of such contaminants, whether man-made or natural, inorganic or organic.