Alessandro Nanni, who graduated in Physics from the University of Milan, is a co-founder of ARIANET with over 25 years of experience in atmospheric dispersion modeling and the assessment of emissions from anthropogenic sources and transport systems. He developed TREFIC, a road traffic emission model based on the EEA-COPERT methodology. He has coordinated or contributed to international projects evaluating the atmospheric impact of transport systems and scenarios, ranging from urban areas (Bologna, Bucharest, Cairo, Doha, Hong Kong, Kaliningrad, Milan, Rio de Janeiro, Rome, Shanghai, Tunis) to regional contexts (Emilia Romagna, Lazio, Valle d’Aosta) and national contexts (Israel, Jordan, Morocco, Qatar, Romania, Tunisia). He has overseen and been responsible for atmospheric assessment studies of airports (Khumasi, Milan, Pisa, Treviso), industrial sources, and other transport systems (construction sites, thermal power plants, oil and LNG drilling sites and terminals, highways, oil & gas industry facilities, ports, power plants, paper mills, refineries, urban and rural road networks, steelworks and foundries, waste treatment plants, etc.) using various atmospheric models in different countries (Italy, Albania, Chile, Congo, Egypt, France, Georgia, Kuwait, Iran, Mexico, Morocco, Qatar, Romania, Russia, Saudi Arabia, Tunisia). He is involved in the EC ERMES research group on mobile emission sources.