1. Environmental Research Centre, Duke Kunshan University, Jiangsu 215316, China;
2. Nicholas School of the Environment, Duke University, Durham, NC 27708;
3. Department of Earth and Environment, Florida International University, Miami, FL 33199;
4. Kimberly Green Latin American and Caribbean Center, Florida International University, Miami, FL 33199;
5. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China