The document summarizes a Japanese International Cooperation Agency project to develop capacity for air pollution control in Ulaanbaatar, Mongolia over two phases. Phase 1 focused on enhancing the Air Quality Department's technical skills, developing an emissions inventory, and strengthening regulatory capacity. Key achievements included new stack gas measurement protocols, a boiler registration system, and disseminating results. Phase 2 will continue building capacity, with activities like improving ambient air quality monitoring, planning new emission reduction measures, and establishing an ongoing air quality management cycle. The goal is to work with Mongolian agencies to reduce air pollutants and protect public health in Ulaanbaatar.