infrastructure in Montreal this year, and even oil-rich Saudi Arabia is getting its first station. Toyota, the world's second-largest automaker, is the largest player in the U.S. consumer market for hydrogen fuel cell cars. Its Mirai – a hydrogen fuel cell family car – has found 5,000 buyers since it was introduced in the fall of 2015. Russ Koble, a spokesman in Toyota's environmental and advanced technology group, said the company expects sales to increase as more fueling stations open. "Toyota has long maintained that hydrogen fuel cell technology could be a zero-emission solution across a broad spectrum of vehicle types," he said. Toyota says the scalability of hydrogen fuel cell technology also has led to two applications for California feasibility studies in another area of interest toTesla: semi-trailer trucks.

Toyota Motor's hydrogen fuel cell powered semi-truck is displayed at AutoMobility LA ahead of the Los Angeles Auto Show Patrick T. Fallon | Bloomberg | Getty Images

Honda also has made a big commitment to hydrogen. There are currently nearly 1,100 Honda Clarity Fuel Cell vehicles on the road in the U.S., said Natalie Kumaratne, a Honda spokeswoman. Honda only offers the Clarity Fuel Cell in California for lease — it offers battery electric power and hybrid versions of the car for lease or sale. Out of the 20,174 total Claritys sold or leased in 2018, 624 were fuel cell variants, 948 were battery-electrics, and 18,602 were the plug-in hybrid. Honda and Toyota have teamed up with a subsidiary of Shell Oil to build new hydrogen fueling