1. Quantitative Sustainability Assessment, Department of Environmental and Resource Engineering, Technical University of Denmark, Bygningstorvet 115, 2800 Kgs. Lyngby, Denmark
2. National Institute for Public Health and the Environment, 3720 BA Bilthoven, The Netherlands
3. Department of Environmental Science, Radboud University Nijmegen, 6525 AJ Nijmegen, The Netherlands