BBC: A research team at Heriot-Watt University is investigating whether urine could be used as a source of renewable energy. The scientists have developed a system to test whether it can be used in fuel cells as an alternative to flammable hydrogen or toxic methanol. It could offer a non-toxic, low-cost, easily transportable alternative. Dr Shanwen Tao and his research partner, Dr Rong Lan, have been awarded a £130,000 grant to develop it. The work has concentrated on …