1. Institute of Technical Thermodynamics; Aachen University; Schinkelstraße 8 52062 Aachen Germany
2. Institute for Advanced Sustainability Studies (IASS); Berliner Str. 130 14467 Potsdam Germany
3. Global Climate Forum; Neue Promenade 6 10178 Berlin Germany
4. Academy of Disaster Reduction and Emergency Management; Beijing Normal University; Beijing China