Due to the great increase in technical knowledge and improvement in procedures, this second edition has been prepared to update existing information. Air pollution legislation is reviewed. Sources of air pollution are examined extensively. They are treated in terms of natural sources, man-made sources, metropolitan regional emissions, emission rates from fuels, incinerators, internal combustion engines, and industrial processes. The effects of air pollution on humans, animals, vegetation, and the economy are dealt with. In each section, specific pollutants and symptoms associated with their intake are discussed. Community air pollution surveys are instituted to determine the sources and effects of air pollution. Control agency programming is established. The text also deals with sampling, analysis, and meteorological aspects of air pollution. The subject is treated in great detail, and intends to provide the kind of information required for the evaluation of air pollution problems. A comprehensive bibliography is included. (BP)