Dung as the new diesel. Thailand, which is a major regional production base for automobiles, is encouraging its car manufacturers to adapt car engines so that they can be powered by human excrement
During a two-year expedition to Mars, a crew of six astronauts can generate over six tons of waste. The current protocol is to ship the faeces back to Earth. Nasa, however, are funding research to create a membrane microbial fuel cell that would recycle the excrement to provide drinking water, fertilizer and electricity. A waste of space? Certainly not.
Canada's Toronto zoo is planning to use 1,900 tonnes of dung produced by the zoo animals to generate power for heating and lighting
Interestingly, the use of excrement as energy is not a new phenomenon and is referred to as Biogas. Cow dung as fuel is commonplace in India, it accounts for over 21% of total rural energy and as much as 40% in some states. Huge towering piles of dung are dried and used as fuel for cooking and heating
Human Feces Powers Rwandan Prison
http://www.wired.com/news/planet/0,2782,68127,00.html
Fly-eating robot powers itself
http://www.cnn.com/2004/TECH/12/27/explorers.ecobot/