Pee Power

http://www.bbc.com/autos/story/20160712-can-a-car-run-on-pee-power
http://www.radionz.co.nz/news/world/308579/pee-power-lights-the-way-at-glastonbury
https://www.rt.com/uk/350687-urine-powered-phone-charger/
http://www.livescience.com/54588-pee-powered-fuel-cells-cheap-electricity.html
http://www.economist.com/news/science-and-technology/21610187-going-loo-can-recharge-smartphone-pee-power
http://www.economist.com/news/science-and-technology/21610187-going-loo-can-recharge-smartphone-pee-power
https://www.oxfam.org/en/pressroom/pressreleases/2015-03-05/pee-power-light-camps-disaster-zones