Several automakers are currently investing in hydrogen fuel cells, including Japanese automaker Toyota whose hydrogen car, the Miari, is pictured above.
Hydrogen-powered cars boast a longer range than battery-powered cars, but a lack of infrastructure (hydrogen stations) has led to general skepticism that the technology can catch on. For hydrogen-powered cars to become a reality at the 2020 Tokyo Olympics, the Japanese government will have to set up hydrogen stations nearby.