Supermarkets and fast food outlets are selling chicken fed on imported soya linked to thousands of forest fires and at least 300 sq miles (800 sq km) of tree clearance in the Brazilian Cerrado, a joint cross-border investigation has revealed. Tesco, Lidl, Asda, McDonald’s, Nando’s and other high street retailers all source chicken fed on soya supplied by trading behemoth Cargill, the US’s second largest private company.