Hydrogen-powered cars and planes are on the rise, and this week Germany announced plans to launch the world's first completely hydrogen-powered passenger train in 2017. In other transportation news, Volvo unveiled a new SuperTruck that's 70 percent more fuel-efficient than big rigs on the road today. The world's first solar-powered helicopter lifted off on its maiden flight in Maryland. And Amsterdam is getting set to launch a fleet of autonomous boats in its famed canals.