Source: Grist

Excerpt:

The global food system is a climate mess, from the widespread use of greenhouse gas-emitting fertilizers to the methane-spewing livestock to all the food that gets tossed into the trash. In the United States, a staggering one-third of all food — something like 130 billion meals annually — gets thrown out. Each year, that discarded stuff represents an estimated 170 million metric tons of carbon emissions — the equivalent of 42 coal-fired power plants. 

But there’s a simple solution, beyond simply reducing waste. According to a new study in the Nature journal Scientific Reports, composting food scraps results in 38 to 84 percent fewer greenhouse gas emissions than tossing them in landfills. Unlike trash in landfills, compost heaps are watered and turned, which aerates the decomposing waste and prevents bacteria from churning out as much methane, a powerful greenhouse gas.

Read more: A simple way to prevent heaps of methane pollution: Composting