Engineers from Geneco, a sustainable-energy company owned by Wessex Water, have unveiled a modified Volkswagen Beetle that runs on compressed methane gas extracted from human waste. A Dung Beetle, if you will.
Biogas is generated when filth from Wessex Water's sewage works is put into a decomposition container, where oxygen-starved bacteria break it down to produce methane. The methane is then harvested and placed in tanks inside the boot of the Beetle, where it can be used to power the car's slightly modified engine.
Read more of "Fart-powered VW Beetle tested in UK" at Crave UK.