4:20Why you pay more for locally grown food – videoBritish apples grown at home are often more expensive than apples shipped from countries thousands of miles away. And it's not just apples. Bananas, which are virtually all imported from tropical countries, are consistently the cheapest fruit available per kilogram on UK supermarket shelves. Josh Toussaint-Strauss investigates the peculiar economics of supermarket fruit, and discovers there are many aspects of our food supply system that don’t appear to make much sense
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