Synergies and Gaps in Circularity and Life Cycle Assessments

This article is a research report that evaluates the synergies and challenges between circularity assessment and Life Cycle Assessment (LCA) in the context of sustainability. It investigates how these two methodologies align and differ, emphasizing the need for a multi-level approach that encompasses philosophy, strategy, assessment, and communication. The findings suggest that while both LCA and circularity assessment can contribute to sustainability assessment methods for circularity strategies, they each have limitations that prevent a complete understanding of environmental performance when used independently. Key challenges identified include data availability, diverse assumptions, and the complexities of multiple life cycles and strategies. The report provides recommendations for integrating the strengths of both assessments, suggesting the use of function-based models and dynamic LCAs to enhance future circularity assessments. Additionally, it discusses how circularity assessment can inform LCA models, particularly in identifying critical factors during goal and scope definitions.