Annual report of the Argonne National Laboratory Radiological and Environmental Research Division regarding activities related to molecular physics and chemistry. This report discusses a study on the physical properties and the chemical reactions of atmospheric constituents, with emphasis on the role of pollutants arising from the use of fossil fuels. Special effort is being placed on understanding nucleation phenomena through the study of the molecular properties of gas phase clusters.

Annual report of the Argonne National Laboratory Radiological and Environmental Research Division regarding activities related to ecology. This report includes studies of pollutants such as sulfur dioxide and trace elements entering the environment from the combustion of fossil fuels, and investigations of radionuclides, which could be discharged from nuclear energy facilities.

Annual report of the Argonne National Laboratory Radiological and Environmental Research Division regarding activities related to atmospheric physics. This report discusses programs involving atmospheric pollution in cooperation with the Multistate Atmospheric Power Production Pollution Study.

Annual report of the Argonne National Laboratory Radiological and Environmental Research Division regarding activities related to the Center for Human Radiobiology. This report discusses a study of the health status of the former employees of a plant that processed thorium ores as well as a study on the oxidation of soluble plutonium.

Annual report of the Argonne National Laboratory Radiological and Environmental Research Division regarding activities related to molecular physics and chemistry. This report discusses studies on electron collisions with molecules, photo-absorption and its consequences such as photo-electron emission, and pertinent theories.

Annual report of the Argonne National Laboratory Radiological and Environmental Research Division regarding activities related to ecology. This report discuses programs to study the role of physical processes involved in transferring pollutants from the combustion of fossil fuels to the water surface, to study the biogeochemical behavior of transuranic elements from the Windscale reprocessing plant, and to study the effects of pollutants from power plants on aquatic organisms in the Great Lakes program.

Annual report of the Argonne National Laboratory Radiological and Environmental Research Division regarding activities related to atmospheric physics. This report discuses programs in air-water heat transfer and on fog formation on cooling ponds, dispersion characteristics in the wakes of buildings and in coastal regimes and measurements of pollutant fluxes to water surfaces.