1. Research Division EU/Europe, German Institute for International and Security Affairs, Berlin, Germany
2. Energy, Climate, and Environment Program, International Institute for Applied Systems Analysis, Laxenburg, Austria
3. Institute of Blue and Green Development, Shandong University, Weihai, China
4. Andlinger Center for Energy and the Environment, Princeton University, Princeton, NJ, USA
5. Energy Planning Program, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
6. Reiner Lemoine Institute, Berlin, Germany
7. Graz University of Technology, Graz, Austria