The conference includes the following topics but is not restricted to them. ・Acid deposition ・Adaptation technology to global and local climate change ・Aerosols ・Assessment of atmospheric environmental impact ・Control and removal of pollutants ・Emergency release (including radio nuclides) ・Emission inventories ・Hazardous materials in the atmosphere (PAHs, heavy metals etc.) ・Interaction between air pollution and climate change and its co-benefit countermeasures ・Measurement and modeling of ozone, PM2.5, greenhouse gases and other air pollutants ・Meteorology related to air pollution ・Remote sensing of chemical components in the troposphere ・Urban air quality and environment There is particular interest in the following topics. ・Chemistry in the troposphere ・Improvement of air quality in developing countries ・Long-range and cross-boundary transport in this region ・Photochemical air pollution ・Pollution control and political issues