Urged by the importance of resource efficiency and circular economy agenda policy makers, many stakeholders are seeking alternatives for current surplus food or side flows within the food supply chain. Any new valorisation or intervention aimed to prevent food waste will however be associated with impacts (monetary and environmental). To allow informed decision making at all levels, from individual stakeholder to policy level, robust, consistent and science based approaches are required. The EU H2020 funded project REFRESH (Resource Efficient Food and dRink for the Entire Supply cHain) aims to contribute to food waste reduction throughout the food supply chain, and evaluate the environmental impacts and life cycle costs. This paper presents a guidance document being developed within REFRESH on how to apply Life Cycle Assessment (LCA) and environmental Life Cycle Costing (E-LCC) and how to combine them in the context of food waste. Recommendations are given on the scoping on footprint studies as well as on change-oriented studies on interventions for side flows from the food supply chain. The overall aim of the current research is contribute to a better scoping practice of LCAs and LCCs of side flows in a food waste context


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