the robotics lab in bristol is 50,000 square foot hive of innovation filled with hundreds of differents they need power to run. over in the bio energy lab, scientists are working on one freely available re—source the world will never run out of, urine. each one of these cylinders is a microbial fuel cell device. it turns waste water into electricity using microbes. so the microbes eat the waste? they eat the waste. that's their favourite item on the menu. right, ok! i've been to that restaurant, yeah. in this unit, two litres of urine is fed into the fuel cell pack. the microbes eat what they need, creating electrons as a by—product. and because they're attached to an electrode surface, it is all collected to produce about 30—110 milliwatts of power. now, that's enough to slowly charge a smartphone, power smart displays or power internal lights for their special portable toilets. this is only one unit of many. when we do it out of the lab, we install these units out of the lab, we have many more of them connected together as a stack. if you're going to glastonbury this year, you might