The impact of air pollution on human health is currently of international concern. A comprehensive review of the subject is given in this volume. Dealing with the common gaseous and particulate air pollutants, including chemical carcinogens, it reviews the epidemiological and exposure chamber study research as well as considering mechanistic studies in the case of particulate matter. The book also addresses the practical issue of setting standards for human exposure to air pollution by including the philosophy of standard setting and a review of current available standards, along with a description of the setting of USEPA revised standards for ozone and particulate matter. Current knowledge of indoor air pollution is also discussed.