title: Estimates of embodied global energy and air-emission intensities of Japanese products for building a Japanese input-output life cycle assessment database with a global system boundary.
abstract: To build a life cycle assessment (LCA) database of Japanese products embracing their global supply chains in a manner requiring lower time and labor burdens, this study estimates the intensity of embodied global environmental burden for commodities produced in Japan. The intensity of embodied global environmental burden is a measure of the environmental burden generated globally by unit production of the commodity and can be used as life cycle inventory data in LCA. The calculation employs an input-output LCA method with a global link input-output model that defines a global system boundary grounded in a simplified multiregional input-output framework. As results, the intensities of embodied global environmental burden for 406 Japanese commodities are determined in terms of energy consumption, greenhouse-gas emissions (carbon dioxide, methane, nitrous oxide, perfluorocarbons, hydrofluorocarbons, sulfur hexafluoride, and their summation), and air-pollutant emissions (nitrogen oxide and sulfur oxide). The uncertainties in the intensities of embodied global environmental burden attributable to the simplified structure of the global link input-output model are quantified using Monte Carlo simulation. In addition, by analyzing the structure of the embodied global greenhouse-gas intensities we characterize Japanese commodities in the context of LCA embracing global supply chains.
authors.affiliation: Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, 305-8506, Japan. nansai.keisuke@nies.go.jp
authors.forename: Keisuke
authors.initials: K
authors.lastname: Nansai
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Kondo
authors.forename: Shigemi
authors.initials: S
authors.lastname: Kagawa
authors.forename: Sangwon
authors.initials: S
authors.lastname: Suh
authors.forename: Kenichi
authors.initials: K
authors.lastname: Nakajima
authors.forename: Rokuta
authors.initials: R
authors.lastname: Inaba
authors.forename: Susumu
authors.initials: S
authors.lastname: Tohno
mesh_terms: D016208:Databases, Factual; D011211:Electric Power Supplies; D007564:Japan