[en] Progress is reported in the following areas of research: air pollution dry deposition - radioisotopes as particles and volatiles; and particle resuspension and translocation. The major pollutants of concern from the nuclear energy industry are long-lived particles (i.e., plutonium and other radionuclides) and waste heat and water vapor from power plant cooling systems. Research activities include studies of atmospheric diffusion and deposition of material on the earth's surface, resuspension of particulate matter, and regional and global transport of material. Transport studies include the modeling of vertical diffusion and deposition, the determination of the effect of wind speed on resuspension rates and study of the vertical temperature structure