The Archbishop of Canterbury has called for “unsustainable” air-freighted food to be replaced gradually by homegrown produce from thousands of new allotments. He said that families needed to respond to the threat of climate change by changing their shopping habits and adjusting their diets to the seasons, eating fruit and vegetables that could be grown in Britain.

The Archbishop was accused, however, of threatening the livelihoods of a million families in sub-Saharan Africa, who depended on exports of fresh produce to Europe.

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