Will hydrogen-powered cars drive us into the future?
Electric cars like Nissan's Leaf and the Tesla are grabbing all the headlines, but big car makers like Toyota and Hyundai are pumping billions into hydrogen-powered technology. Toyota, for instance, expects 30 percent of all vehicles to be hydrogen powered by 2050.
A small hydrogen-fuelled car company called Riversimple calls itself the only independent hydrogen car startup in the world.