1. Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
2. Department of Environment Systems, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8563, Japan
3. Integrated Sustainability Analysis, School of Physics, Faculty of Science, The University of Sydney, Sydney, New South Wales 2006, Australia
4. Department of Environmental Studies for Advanced Society, Graduate School of Environmental Studies, Tohoku University, 468-1, Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-0845, Japan
5. Department of Arts, School of Humanities and Culture, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 259-1292, Japan