Abstract
Purpose
Over the past two decades, consequential life cycle assessment (CLCA) has emerged as a modeling approach for capturing environmental impacts of product systems beyond physical relationships accounted for in attributional LCA (ALCA). Put simply, CLCA represents the convergence of LCA and economic modeling approaches.
Method
In this study, a systematic literature review of CLCA is performed.
Results
While initial efforts to integrate the two modeling methods relied on simple partial equilibrium (PE) modeling and a heuristic approach to determining affected technologies, more recent techniques incorporate sophisticated economic models for this purpose. In the last 3 years, Multi-Market, Multi-Regional PE Models and Computable General Equilibrium models have been used. Moreover, the incorporation of other economic notions into CLCA, such as rebound effects and experience curves, has been the focus of later research. Since economic modeling can play a prominent role in national policy-making and strategic/corporate environmental planning, developing the capacity to operate LCA concurrent to, or integrated with, these models is of growing importance.
Conclusions
This paper outlines the historical development of such efforts in CLCA, discusses key methodological advancements, and characterizes previous literature on the topic. Based on this review, we provide an outlook for further research in CLCA.
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Notes
Affected technology was originally referred to as marginal technology in Weidema’s earlier papers (e.g., Weidema et al. 1999)
Comparative LCA would later be referred to as CLCA.
Another definition forwarded by Weidema et al. (1999) for affected technology is the technology that changes its capacity/production in response to changes in demand.
At the time of publication, Weidema et al. (1999) referred to affected technologies as marginal technologies, but has more recently recommended that the term affected technologies be used to avoid confusion.
Net social payoff is defined as the sum of consumer and producer surplus (Francois and Hall 1997).
Based on the laws of supply and demand, price elasticities of supply and demand are positive and negative, respectively.
Ekvall (2002) states that softlinking manually feeds the results of one model into the other, while hardlinking combines two types of models into a single model
See US EPA (2010) for more information on the FAPRI model used to assess the ILUC impacts associated with US biofuel policy
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Earles, J.M., Halog, A. Consequential life cycle assessment: a review. Int J Life Cycle Assess 16, 445–453 (2011). https://doi.org/10.1007/s11367-011-0275-9
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DOI: https://doi.org/10.1007/s11367-011-0275-9