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A bio-waste container stands outside a biogas plant in the western Austrian village of Koessen June 4, 2013. Food waste is used at the biogas plant to help produce electricity. Cutting the amount of food that goes to waste is the special theme of this year's World Environment Day on June 5. The U.N. Food and Agriculture Organization estimates that about a third of all the food produced for human consumption worldwide every year is wasted. Picture taken June 4, 2013. REUTERS/Dominic Ebenbichler (AUSTRIA - Tags: ENVIRONMENT FOOD SOCIETY) - RTX10C1G Dominic Ebenbichler/Reuters