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 released from decomposing organic matter is about 60% methane, making it a valuable renewable source of natural gas. But carbon dioxide, which makes up the other 40%, must be removed before the ...

While biogas — energy produced mostly from crops or animal manure — has long been promoted as part of the European Union’s ...