BEST-Cities is designed to provide city authorities with strategies they can follow to reduce city-wide carbon dioxide (CO2) and methane (CH4) emissions. The tool quickly assesses local energy use and energy-related CO2 and CH4 emissions across nine sectors (i.e., industry, public and commercial buildings, residential buildings, transportation, power and heat, street lighting, water & wastewater, solid waste, and urban green space), giving officials a comprehensive perspective on their local carbon performance. Cities can also use the tool to benchmark their energy and emissions performance to other cities inside and outside China, and identify those sectors with the greatest energy saving and emissions reduction potential.
Another important feature of BEST-Cities is its ability to help city authorities evaluate the appropriateness of more than 70 different strategies that can reduce their city's energy use and emissions. By identifying those strategies most relevant to local circumstances, the tool helps local government officials develop a low carbon city action plan that can be implemented in phases, over a multi-year timeframe.
BEST Cities工具还可以帮助市政部门排列城市各行业行动的优先顺序，并评估70多项节能减排政策战略的适宜性。BEST Cities 工具可以找出与城市具体情况最匹配的战略， 协助本地政府制定可以在多年内分阶段实施的低碳城市行动方案。
This tool was developed with the generous support of the Energy Foundation China through the Department of Energy under contract No.DE-AC02-05CH11231. We also acknowledge the significant assistance of Steve Hammer, Urban Development and Resilience Unit, World Bank, and Ben Ede, programmer. We would like to thank Ivan Jacques and Pedzi Makumbe of the World Bank's Energy Sector Management Assistance Program (ESMAP). BEST Cities is partly based on a model originally developed by ESMAP known as TRACE, the Tool for the Rapid Assessment of City Energy.