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

Keisuke Nansai, Yasushi Kondo, Shigemi Kagawa, Sangwon Suh, Kenichi Nakajima, Rokuta Inaba, Susumu Tohno

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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.

Original languageEnglish
Pages (from-to)9146-9154
Number of pages9
JournalEnvironmental Science and Technology
Volume46
Issue number16
DOIs
Publication statusPublished - Aug 21 2012

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry

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