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Charlotte Smith visits a farm in Wiltshire, to find out about using farmland to produce energy. East Farm at Codford near Warminster has an anaerobic digester, a biomass boiler, and several acres of solar panels. Charlotte hears how 100,000 tonnes a year of food waste can be turned into electricity, with fertiliser produced as a by-product. We also hear about the controversy surrounding the decision by some farmers to burn straw as an energy source.

Producer: Emma Campbell