See the photo of a clock that uses urine to function.....in India! http://newswatch.nationalgeographic.com/2013/07/31/growing-teeth-and-four-more-odd-uses-for-urine/
See the photo of a clock that uses urine to function.....in India! http://newswatch.nationalgeographic.com/2013/07/31/growing-teeth-and-four-more-odd-uses-for-urine/