1. Graduate
School of Economics, Waseda University, Tokyo, 169-8050, Japan
2. Center for Material
Cycles and Waste Management Research, National Institute for Environmental
Studies, Tsukuba, 305-8506, Japan
3. Graduate
School of Engineering, Tohoku University, Sendai, 980-8579, Japan
4. Faculty
of Environment and Natural Resources, University of Freiburg, Freiburg, 79085, Germany