Wood, coal, or natural gas are the usual culprits in terms of cooking fuel, but some clever chemistry makes poop into a surprisingly sustainable alternative.

A Danish company’s plans to turn cow manure into renewable energy in Minnesota and Wisconsin’s dairy country have tanked, at least for now. Nature Energy planned to build several large-scale anaerobic ...

CHICAGO -- A unique climate change fighting machine is being used to divert thousands of pounds of food waste from landfills, as well as feed people and heat city homes in a clean and sustainable way.