Billions of pounds of food go to waste every year in the U.S., food that often ends up in landfills, contributing to the production of climate-warming methane. Reducing food waste can help the environment, and there are also ways that food can be kept out of landfills and put to use. One of the most common and easiest ways to turn food waste into something valuable is by composting. Composting is a natural way to turn food waste into fertilizer that’s high in nutrients.