1. Sustainable Solutions Germany (SSG), Hasengartenstr 9b, 65189 Wiesbaden, Germany
2. Industrial Ecology Programme (IndEcol), Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway
3. Environment Center (CUEC), Charles University in Prague, J. Martiho 2/407, 162 00 Prague 6
4. Institut für Energie und Umweltforschung Heidelberg GmbH (IFEU), Wilckensstrasse 3, 69120 Heidelberg, Germany