1. Aalto University School of Science Department of Applied Physics, , P.O. Box 15100, FI-00076 Aalto, Espoo, Finland
2. Finnish Environment Institute , Latokartanonkaari 11, FI-00790 Helsinki, Finland
3. Lund University International Institute for Industrial Environmental Economics (IIIEE), , Tegnérsplatsen 4, P.O. Box 196, SE-221 00 Lund, Sweden
4. Technical University of Denmark Department of Technology, Management and Economics, , Anker Engelunds Vej 1 Bygning 101A, 2800 Kgs. Lyngby, Denmark