Comparing the sustainability of local and global food products in Europe

In the debate surrounding the sustainable future of food, claims like “buy local” are widespread in publications and the media, supported by the discourse that buying “local food” provides ecological, health and socio-economic benefits. Recognising the lack of scientific evidence for this claim, this paper aims to compare the results of sustainability assessments for 14 local and global food products in four sectors within four European countries. Each sector has been analysed independently using sustainability indicators across five dimensions of sustainability: environmental, economic, social, health and ethics. In order to determine if local products generally perform better, an outranking analysis was conducted to rank the products relative to their sustainability performance. Outranking is a multi-criteria decision aid method that allows comparison of alternatives based on quantitative and qualitative indicators at different scales. Each product is also characterized by a degree of localness in order to relate sustainability and localness. The results are given in the form of phi flows, which are relative preference scores of one product compared to other ones in the same sector. The rankings showed that global products consistently come last in terms of sustainability, even when the preference functions and weighting of the indicators were varied. The first positions of the rankings were taken either by the most local or an intermediary product. Moreover, detailed rankings at the attribute level showed the relative strengths and weaknesses of each food product along the local-global continuum. It appeared that the strength of local and intermediary products was mainly in health and socio-economic dimensions, particularly aspects of care and links to the territory such as biodiversity, animal welfare, governance or resilience. In relation to global food products, they presented substantial advantages in terms of climate change mitigation and affordability to consumers. This contrasts with the food-miles ecological claim. Thus, we conclude that distance is not the most critical factor in improving sustainability of food products, and that other criteria of localness (identity, governance or size) play a more critical role.

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