After a few drinks, the call of nature inevitably beckons. But scientists from the University of the West of England believe urine isn't just the result of one-too-many, but also a potent energy source. This prototype pee-power toilet is harvesting human urine to generate electricity. Led by Professor Ioannis Ieropoulos, the scientists are working with aid agency Oxfam to install cubicles like this in refugee camps.
"It's basically a live trial to demonstrate the microbial fuel cell technology over a long period of time; how it can continuously generate electricity from urine in real time."