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Environmental impacts of food waste: Learnings and challenges from a case study on UK. | LitMetric

Environmental impacts of food waste: Learnings and challenges from a case study on UK.

Waste Manag

Technical University of Denmark, Department of Environmental Engineering, Bygninstorvet 113, 2800 Lyngby, Denmark.

Published: June 2018

AI Article Synopsis

  • The study examines the environmental impacts of avoidable food waste in the UK across four sectors: processing, wholesale and retail, food service, and households, using a bottom-up life cycle assessment method.
  • It quantifies impacts in ten categories, revealing that Global Warming effects of food waste range from 2000 to 3600 kg CO-eq. t due to varying waste compositions and highlights significant contributors like land use changes and food production.
  • Recommendations for improvement include enhancing data on food product breakdown, indirect land use impacts, and cooking-related waste, while also emphasizing the importance of careful selection of food production datasets to mitigate overestimation of impacts.

Article Abstract

Food waste, particularly when avoidable, incurs loss of resources and considerable environmental impacts due to the multiple processes involved in the life cycle. This study applies a bottom-up life cycle assessment method to quantify the environmental impacts of the avoidable food waste generated by four sectors of the food supply chain in United Kingdom, namely processing, wholesale and retail, food service, and households. The impacts were quantified for ten environmental impact categories, from Global Warming to Water Depletion, including indirect land use change impacts due to demand for land. The Global Warming impact of the avoidable food waste was quantified between 2000 and 3600 kg CO-eq. t. The range reflected the different compositions of the waste in each sector. Prominent contributors to the impact, across all the environmental categories assessed, were land use changes and food production. Food preparation, for households and food service sectors, also provided an important contribution to the Global Warming impacts, while waste management partly mitigated the overall impacts by incurring significant savings when landfilling was replaced with anaerobic digestion and incineration. To further improve these results, it is recommended to focus future efforts on providing improved data regarding the breakdown of specific food products within the mixed waste, indirect land use change effects, and the share of food waste undergoing cooking. Learning from this and previous studies, we highlight the challenges related to modelling and methodological choices. Particularly, food production datasets should be chosen and used carefully, to avoid double counting and overestimation of the final impacts.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.wasman.2018.03.032DOI Listing

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