Local crops can feed less than one-third of the population
This paper models the production of six food crops, and finds that only 11-28% of the world’s population (depending on crop) would be able to meet their demands for those crops by using only food produced within a 100 km radius, based on current production and consumption patterns. The aim of the paper is to assess the physical constraints that limit the extent to which food supply can become localised and thus inform the ongoing debates around local food and food sovereignty.