1. School of Environment, Tsinghua University, Beijing, China;
2. Department of Engineering, University of Cambridge, Cambridge, UK;
3. Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Canada;
4. Korea Biochar Research Center, O-Jeong Eco-Resilience Institute (OJERI) & Division of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea;
5. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;
6. State key laboratory of animal nutrition, China Agriculture University, Beijing, China;
7. College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, China