paper in the journal Nature Food sought to discover how many of the world’s people could be fed with staple crops grown within 100 kilometres of where they live.55 It discovered that wheat, rice, barley, rye, beans, millet and sorghum grown within this radius could feed only a quarter of the world’s people. Maize and cassava grown within 100 kilometres could supply a maximum of 16 per cent of those who need them. The average minimum distance at which the world’s people can be fed is 2,200 kilometres. For those who depend on wheat and similar cereals, it’s 3,800 kilometres. A quarter of the
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