Feeding the world releases up to 17,000 megatonnes of carbon dioxide into the atmosphere annually, according to a new analysis released today by the CGIAR Research Program on Climate Change, Agriculture and Food Security (CCAFS). But while the emissions “footprint” of food production needs to be reduced, a companion policy brief by CCAFS lays out how climate change will require a complete recalibration of where specific crops are grown and livestock are raised.