Well, here's a usable idea at last - Science Museum looks to "poo power". There's so much BS around the US, that we could power quite a few cities just from the stuff the leaders put out. I hope we hear more about this, seriously, though, because it sounds like a commendable, practical, and realistic idea. Besides, the ancients heated their homes, like this site shows in its history titled “Anaerobic Digestion – Yesterday, Today and Tomorrow.â€� So instead of thinking green, maybe we should start thinking brown...