That aspect of chemistry concerned with air and water pollution, pesticides, and chemical and radioactive waste disposal. A random selection of specific areas of research includes lead and other toxic chemicals in the air, effects of increased burning of coal, biological modification of wastes, detoxification methods, pesticide content of fish, environmental analytical and monitoring techniques, utilization of biomass, drinking water quality, organic contaminants in lakes and rivers, and effect of deforestation on carbon dioxide and oxygen content of air.