1. Chair of Ecological Systems Design, Institute of Environmental Engineering, ETH Zürich, 8093 Zürich, Switzerland
2. National Centre of Competence in Research (NCCR) Catalysis, ETH Zürich, 8093 Zürich, Switzerland
3. Empa-Swiss Federal Laboratories for Materials Science and Technology, Technology and Society Laboratory, 9014 St. Gallen, Switzerland
4. International Institute for Applied Systems Analysis (IIASA), A-2361 Laxenburg, Austria
5. Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland