The book contains papers presented at the twentieth in a series of annual International Conferences dealing with Modelling, Monitoring and Management of Air Pollution. The papers deal with advances in a wide variety of topics, including: Air Pollution Modelling; Air Quality Management; Emission Studies; Monitoring and Measuring; Aerosols and Particles; Atmospheric Chemistry; Indoor Air Pollution; Policy Studies; Climate Change and Air Pollution; Regional and Global Studies; Exposure and Health Effects; Rural Pollution Studies; Air Pollution Effects on Ecosystems; Air Pollution Mitigation; Case Studies.