1. Institute for Advanced Sustainability Studies (IASS), Potsdam, Germany
2. Technical Thermodynamics, Aachen University, Aachen, Germany
3. State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University (BNU), Beijing, China
4. School of Sustainability, Arizona State University (ASU), Tempe, AZ, USA
5. Global Climate Forum (GCF), Berlin, Germany