Biz school trained CEO: "There's gonna be a breakthrough out there, gonna make clean hydrogen cheap! Let's use it for transportation!"
And the long suffering engineers tell's him: "No matter how it's created (magical unicorn farts for the win!) hydrogen just isn't a compelling energy carrier over batteries today. It's inefficient, leaky, and requires expensive equipment. The physics is clear on this."
CEO: "Eventually we'll have magical ways to store it and transport it safely, and the prices will come down!"
Engineers: "Great! Get back to us when that happens. In the meantime, we'll keep using batteries until something better comes along. Maybe that's hydrogen fuel cells (but we doubt it), maybe it's Mr. Fusion, or captured black holes on a stick always pulling us forward. But at the moment, sir, it's just not compelling to use hydrogen over batteries."
CEO: "You guys are all nay sayers. Nerd harder! The only way to make things cheaper is to build up economies of scale! So we'll start using hydrogen today so in the future, it'll be better!"
Engineers: "But if we use hydrogen now, it'll create even MORE green house gas than using gasoline! Why should we do that when it's imperative to reduce green house gases as much as possible?"
CEO: "Because economics! Scale! You've got it all backwards!"
Engineers: "Take it up with Lord Kelvin. Thermodynamics clearly shows..."
CEO: "You're Wrong! Our marketing dept. says so! You guys are all the same. And who is this Kelvin guy? Does he wanna play golf?"