Here in Oz we have done better than that. ESI (Environmental Solutions) went to the animals at the top of the food chain and use their poo to produce construction material and oil. I don't think it's the cooking variety oil. Heating and diesel stuff, I believe. Trucks and buses will now be able to continue with the fahrting processes.
Must be good stuff judging by the way their shares jumped from 15c from the day they re-listed on 19/1/06 to 88c on 3/3/06
anon