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A proposal for the definition of resource equivalency factors for use in product life‐cycle assessment
Author(s) -
Guinée Jeroen B.,
Heijungs Reinout
Publication year - 1995
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620140525
Subject(s) - resource depletion , abiotic component , resource (disambiguation) , life cycle assessment , product (mathematics) , environmental science , global warming potential , impact assessment , production (economics) , component (thermodynamics) , environmental impact assessment , biotic component , environmental economics , computer science , environmental resource management , ecology , mathematics , biology , greenhouse gas , economics , computer network , geometry , macroeconomics , public administration , political science , physics , thermodynamics
Environmental life‐cycle assessment (LCA) of products has been the focus of growing attention in the last few years. The methodological framework has been developed rapidly, and a provisional “Code of Practice” has been drawn up by an international group of experts. One of the elements of LCA is impact assessment, which includes a characterization step in which the contributions of resource extraction and polluting emissions to impact categories such as resource depletion, global warming, and acidification are quantified and aggregated as far as possible. This can be achieved by multiplying extractions and emissions by a so‐called equivalency factor and aggregating the results in one or more effect score(s) per impact category. In this report a proposal is developed for equivalency factors indicating the relative depletion of a resource per unit extracted. It is proposed to measure depletion by physical data on reserves and production and regeneration rates, and to distinguish between abiotic and biotic resources. Equations are developed to calculate equivalency factors for these two categories of resources, resulting in so‐called abiotic depletion potentials (ADP) and biotic depletion potentials (BDP). The application of these ADPs and BDPs in LCA is illustrated.