Think your car runs like crap? A sewage utility in Bristol, UK, has converted a Volkswagen Beetle to run on human waste. The Bio-Bug is the first car in the UK to run on byproducts of sewage processing, and if its trial run is successful Wessex Water, the utility company that made the car, might build a whole fleet of them.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.