Jack Brouwer, a professor of mechanical and aerospace engineering and director of the National Fuel Cell Research Center at the University of California, Irvine, says it's "very unfortunate that the infrastructure has not been sufficient for quite a few people" who drive hydrogen-powered vehicles. Certainly, he says, it hasn't grown as quickly as EV-charging infrastructure, with "many more millions spent" on those stations. In December, California pledged $115 million to add up to 111 more hydrogen-fueling stations by 2027. "I'd suggest it's too slow, but it is coming along," Brouwer says. Read More