1. Institute of Environmental Sciences (CML), Leiden University, 2333 CC Leiden, the Netherlands
2. College of Land Science and Technology, China Agricultural University, 100193 Beijing, China
3. Leiden University College The Hague, 2595 DG The Hague, the Netherlands
4. The Netherlands Organisation for Applied Scientific Research TNO, 2595 DA The Hague, the Netherlands
5. Institute for Ecological Economics, Vienna University of Economics and Business, 1020 Vienna, Austria