Growing pains



Shoppers may well have noticed the cost of their food purchases has risen recently. After a long period of benign food price inflation, prices are on the way up, and it's largely down to wheat. Drought in some parts of the world and floods in others have blighted wheat harvests, even as global demand has soared with increased consumption from developing countries and its use in the manufacture of biofuels. While it adds up to only a small amount extra on the cost of a loaf of bread for consu

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