1. School of Economics and Business Administration, Chongqing University, Chongqing, China
2. Department of Environmental Engineering, University of Novi Sad, Faculty of Technical Sciences, Novi Sad, Serbia
3. Key Laboratory of Three Gorges Reservoir Region’s Eco-Environment under Ministry of Education, Chongqing University, Chongqing, China
4. Department of Environmental Engineering, Chongqing University, Chongqing, China
5. School of Environment, Tsinghua University, Beijing, China