This poster, painted by an anonymous author, was realized by the Educational Services of the United States Food Administration between 1917 and 1919 during the First World War.
The image shows a woman in the act of throwing the leftover food: the message is that the largest number of victims was not caused directly by the war but from its main consequence: the hunger. So they invite the american civilians not to waste food resources, eat less and not to throw anything away in order to save food