1. School of Environment, Tsinghua University, Beijing 100084, China
2. CECEP Industrial Energy Conservation Co., Ltd., Beijing 100082, China
3. Center for Ecological Civilization, Tsinghua University, Beijing 100084, China
4. Princeton School of Public and International Affairs, Princeton University, Princeton, New Jersey 08544, United States
5. Zhejiang Provincial Key Laboratory of Water Science and Technology, Department of Environment, Yangtze Delta Region Institute of Tsinghua University, Jiaxing 314006, Zhejiang, China