1 Quantitative Sustainability Assessment, Department of Environmental and Resource Engineering, Technical University of Denmark, Produktionstorvet 424, 2800 Kgs. Lyngby, Denmark. Electronic address: [email protected].
2 Swiss Federal Office of Public Health, Schwarzenburgstr., 157, 3003 Bern, Switzerland; Swiss Federal Institute of Technology (ETH) Zurich, Institute for Chemical and Bioengineering, Vladimir-Prelog-Weg 1-5, 8093 Zurich, Switzerland.