We got a sneak peek inside Found Energy's lab, just as it gears up to supply heat and hydrogen to its first customer. The crushed-up soda can disappears in a cloud of steam and--though it's not visible--hydrogen gas. "I can just keep this reaction going by adding more water," says Peter Godart, squirting some into the steaming beaker. "This is room-temperature water, and it's immediately boiling. Doing this on your stove would be slower than this." Godart is the founder and CEO of Found Energy, a startup in Boston that aims to harness the energy in scraps of aluminum metal to power industrial processes without fossil fuels.