Food is meant to be eaten, not tossed in the trash. Unfortunately, wasted food is the number one material in our landfills. When food decomposes in a landfill, it generates methane, a powerful greenhouse gas. And that’s not the only problem with wasting food: Wasting about a third of our food supply in the United States costs us $382 billion each year, and growing food that’s ultimately wasted swallows up 16 percent of our cropland and agricultural water.