1. School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, P. R. China
2. Department of Civil, Environmental and Architectural Engineering, Environmental Engineering Program, University of Colorado, Boulder, Colorado 80309, United States
3. Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
4. Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
5. State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
6. University of Chinese Academy of Sciences, Beijing 100049, China
7. Department of Civil and Environmental Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
8. School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia
9. School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, Arizona 85287, United States
10. School of Forestry and Environmental Studies, Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States