The Asian Development Bank (ADB) has commissioned Chreod Ltd. to support the Clean Air Initiative for Asian Cities Center in the development of a methodology for assessing cities’ energy and CO2 emissions, and modeling impacts of alternative development scenarios arising from changes to transport and more energy-efficient forms of metropolitan growth. Chreod will model transport, land use, density, and development intensity scenarios for three pilot cities: Ho Chi Minh City (Vietnam), Dalian (China), and Colombo (Sri Lanka).