Just watched a news feature on a process designed and patented by a local university. A truck in experimental stage, a generator and a bio-fuel plant all run on cow manure. Yep, a true methane fuel plant that is practical. They also have a test farm in Idaho that is running the whole farm on poop-o' 6,000 cattle. Not only is it running the farm, but it's tied into the power grid and is ADDing power. Wow, and I always thought feed lots and dairy farms produce, three things: two are excretions and the other is Flies.