Jogjaman Jap of Singapore's Horizon Energy Systems shows off his company's new plug-and-play hydrogen fuel cell for small UAVs. Its proprietary chemical hydride hydrogen generator means you just add water. It produces 200W of continuous power for six to seven hours.
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.