On October 22-26, 1979, the 10th International Technical Meeting on Air Pollution Modeling and Its Application was held in Rome, Italy. The technical report of that meeting, under the auspices of NATO's Committee on the Challenges to Modern Society, provides a forum for the discussion of recent findings and developments in air pollution control and air quality modeling. The topics for discussion are divided into six broad categories with numerous articles on various aspects in each categories. The categories include Tall Stacks, Complex Terrain and Weak Wind Conditions, Multiple Sources, Mesoscale Diffusion, Regulatory Applications, and Heavy Gases. An agenda and list of participants is included.