While electric vehicles are being favored as the future of transportation, Americans are beginning to embrace hydrogen cars following confirmation that over one million miles of hydrogen miles have been driven in the U.S.

That figure comes courtesy of First Element, a provider of hydrogen with its True Zero re-fuelling stations across the country. The company has calculated that through some 6,300 refills, 16,000 kg (35,273 pounds) of hydrogen has been used, translating into an impressive one million miles.

In the seven months ending May 2016, First Element opened 15 hydrogen stations across California, giving owners of the Toyota Mirai and Hyundai Tucson Fuel Cell CUV a place to refill their vehicles in the knowledge that they’ll be emitting nothing but water vapor.

While hydrogen cars are slowly gathering pace, they are still far, far less popular than electric vehicles and much more difficult to refill. In fact the US Department of Energy says there are only 29 hydrogen refueling stations in all of the U.S.

While some pundits believe hydrogen vehicles are the way of the future, automakers aren’t so sure, leading some to simultaneously develop hydrogen and electric vehicles, eager to see which technology is the best.

PHOTO GALLERY