The potential for a symbiotic relationship between the environment, cars and people may be about to take a giant leap forward. London's Daily Telegraph reports that a group of engineers from Genco have developed a bio-bug (Volkswagen bug) that runs on human waste. The car is powered for 10,000 miles from the excrement from 70 households (annually). The human waste bio-bug would be carbon neutral because it would not add any greenhouse gas to that already produced. The fuel would be produced at sewage plants, which already produce the necessary methane fuel from waste. While the technology, fully implemented, would not produce sufficient methane to power the entire fleet of cars, it would be a significant step forward and is further indication of the potential for technology to make substantial greenhouse gas emission reductions.