The US Has Millions of Tons of a Low-Carbon Fuel Source, But It’s Being Thrown Away

The U.S. generates millions of tons of food scraps; inedible fats, oils and greases; sewage and manure. Some of this organic waste is used for energy or fertilizer, but most of it—around 50 million tons a year—is sent to landfills, incinerated, or otherwise left to decompose.

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