A long historical emission inventory of major air pollutants in Asia during 1950-2015 was developed as Regional Emission inventory in ASia version 3 (REASv3). Trends of emissions and changes in source contributions in countries and regions in Asia during these 6 decades were analyzed. REASv3 provides monthly gridded data with 0.25° by 0.25° resolution for major source categories as well as tables of emissions by countries and sub-regions for major sectors and fuel types. See the details HERE. Research activities for emission inventory of air pollutants and climate forcers in Asia implemented in ACAP are introduced HERE.