1 Consortium on Health, Environment, Education and Research (CHEER), and Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, Hong Kong SAR, China. ybman@eduhk.hk.
2 School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China.
3 Department of Geography, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR, China.
4 Department of Civil and Environmental Engineering, the Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, China.