1. School of Energy and Environment, City University of Hong Kong, Hong Kong SAR, China
2. School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
3. Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hong Kong SAR, China
4. Department of Chemistry and Molecular Biology, University of Gothenburg, Gothenburg, Sweden
5. State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
6. Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova Scotia, Canada
7. Department of Energy, Environment, and Chemical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
8. School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, China