The forecast-proposal phase of the air quality plan for the province of Trento, Italy, includes the following: project pollutant emissions for no remedial action, estimate air quality by diffusion modeling no intervention, define air quality objectives, define strategies and scenarios for emissions reduction, forecast emissions for different scenarios, estimate air quality by diffusion modeling of different scenarios, define priorities, timescale, and responsibility for application of the plan, and develop a strategy for informing the public.The pollutants considered are NOx, CO, total particulates, O3, benzene, and SOx.