Research, innovation and technological transfer on air pollution modelling, chemical transformation of gases and aerosols in the lower atmosphere, measurement and chemical and physical characterization of atmospheric particulate matter. Development of models for simulating the concentration and deposition fields of air  pollutants at different scales - from street  canyons to the national and continental  scales in order to evaluate their impact on    human health, ecosystems and cultural heritage. Development of modelling chains allowing  to evaluate the efficiency and cost-effectiveness of possible emission reduction strategies to better address air-quality policies. Experimental activities are performed both in a fixed and in a transportable laboratory for measurement campaigns and are mainly aimed at the chemical-physical characterization of particulate matter. Integrating measurements and models contributes to amplify the diagnostic skills.