Abstract
The Italian Aerosols Society (IAS) organizes its second training school aimed at students, researchers and practitioners in the field of atmospheric aerosols. The School will run for 5 days with 40 hours of lessons and a program that, after an introduction on basic skills, will examine two issues closely related and highly relevant: the numerical modelling to simulate the dispersion of pollutants in the atmosphere and source apportionment by receptor models.