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.

Biogas and anaerobic digestion made number one in HowStuffWorks' list of wacky alternative energy, and poop-to-energy biogas projects have proven popular on Discovery News too. From biogas in Haitian ...

Biogas digesters – a simple form of technology that turns waste into fuel – have been around for centuries. But only recently have intrepid urban homesteaders begun adding this nifty piece of ...