according to the food and agriculture organization (fao), food waste is responsible for 8 percent of global human-made greenhouse gas emissions. the fao concludes that nearly 30 percent of all available agricultural land in the world - 1.4 billion hectares - is used for produced but uneaten food. the global blue water footprint of food waste is 250 km, that is the amount of water that flows annually through the volga or 3 times lake geneva.