...associated with this interminal hydrogen nonsense a while back. I'm on a cell phone right now, and it is thus not possible to provide a link, but it's in my journal.
Hydrogen in general is a thermodyamic shell game. It is not, and never will be a source of primary energy on this planet unless fusion reactors are developed, in which case the demand for hydrogen fuel will be nearly vanishingly small. I do not expect that a practical fusion reactor providing exergy will appear for decades, if then.
Thus they will already be "too late" because "too late" is here and now. The climate disaster is upon us.
Making hydrogen from clean and sustainable electricity, of which there is only one kind, nuclear electricity, wastes clean and sustainable electricity for no good reason.
I often compare hydrogen fantasies to the game of three card Monte, which is played by skillful hucksters to fleece willing marks. There is no way to win; there are only ways to lose.
Until all the world's electrical power is provided by clean primary energy, which is nowhere near true - things are getting worse, not better - these hydrogen fantasies are simply destructive nonsense thinking.
No government can repeal the second law of thermodynamics. That's a fact. Facts matter.