1. Institute for Ecological Economics, Vienna University of Economics and Business, 1020 Vienna, Austria
2. Industrial Ecology Programme, NTNU Trondheim, 7491 Trondheim, Norway
3. Ecosystems Services and Management, International Institute for Applied Systems Analysis, 2361 Laxenburg, Austria
4. Institute for Food and Resource Economics, University of Bonn, 53115 Bonn, Germany
5. Center for Development Research, University of Bonn, 53113 Bonn, Germany