This report focuses on renewable carbon in recycling scenarios and the key challenges in LCA and carbon footprint assessments. It examines system boundaries, allocation methods, and biogenic carbon accounting approaches, highlighting their influence on sustainability evaluations. The report emphasises the cut-off and avoided-burden approaches for recycling while recommending the -1/+1 method for biogenic carbon transparency. However, it also identifies contradictions between LCA results and broader sustainability goals, such as the EU waste hierarchy, which prioritises recycling. To address these inconsistencies, the report suggests integrating LCA with additional sustainability metrics like land use and recyclability. Ultimately, refining these methodologies will enhance the accuracy and reliability of environmental assessments for bio-based and recycled materials.

This report is the second report of a larger RCI project on LCA methodology, which includes two additional publications:

Report 1 of 3 – Renewable Carbon in LCA Guidelines
Report 3 of 3 – Non-technical Summary

Please find these additional reports by following the respective links at the bottom of this page.

Renewable Carbon in LCA Guidelines (146 pages) evaluates methodological choices which impact LCAs for products containing renewable carbon in existing LCA frameworks and guidelines. The study specifically examines the similarities and differences in the methodological choices of guidelines, as well as the implications of these methodological aspects on the resulting LCA outcomes.The frameworks were selected based on their relevance and legitimacy in the industry, academia and policy field, and include: ISO 14040/44, ISO 14067, GHG Protocol Product Standard, PACT’s Pathfinder Framework, the PCF Guideline for the chemical industry by Together for Sustainability (TfS), EPD for the construction industry – ISO 14025 and EN 15804, the Renewable Energy Directive, the Product Environmental Footprint (PEF) and the JRC’s plastics LCA methodology. One field with a particularly large methodological freedom is recycling.

This report is the first report of a larger RCI project on LCA methodology, which includes two additional publications:

Report 2 of 3 – Renewable Carbon in Recycling Situations
Report 3 of 3 – Non-technical Summary

Please find these additional reports by following the respective links at the bottom of this page.