Boffins in the states have come up with a novel way of powering your car, extracting hydrogen from urine
The technology uses significantly less power to extract the hydrogen out from urine than it takes to do the same with water. This is due to the Hydrogen being less tightly bound to the nitrogen in urine. The scientists reckon they can get 60 mpg pee powered cars out in production within a year. Humans produce 2-3 Litres of urine a day, making it an abundant power supply.