I have also been listening to what so called renewable energy could do to make hydrogen since the 1970's. There is, in 2025, still a difference between the words could and is.
The concentration of the dangerous fossil fuel waste carbon dioxide has risen from around 330 ppm in 1975, the year before the first issue of the Journal of Hydrogen Energy was published in 1976 to over 425 ppm today, while all the time antinukes prattled on about so called "renewable energy."
International Journal of Hydrogen Energy
The hydrogen miracle didn't happen, isn't happening and won't happen.
The reason is the laws of thermodynamics. The obvious fact that storing energy in any form wastes energy is inherent in the second law of thermodynamics which cannot be repealed by wishful thinking.
The case is exactly the same as the requirement that wind garbage be backed up by the combustion of dangerous fossil fuels, only worse, the requirement for a redundant system. It's worse because it would require vastly more destroyed wilderness for this dark and useless fantasy to pretend that enough hydrogen could be produced to cover month long periods of Dunkelflaute. It pretends that there is enough water, enough platinum, and enough material to do this.
There isn't.
Just yesterday, CleanTechnia, a cheering site for so called "renewable energy" published that the Norwegian Ferry line Norled could have avoided huge losses if it had skipped playing with the tiresome half a century old hydrogen fantasy:
Norways Ferry Operator Norled Could Have Saved Money & Staff by Skipping Hydrogen
They noted that hydrogen was dirtier even in Norway, with the bulk of electricity generated by destroying rivers with dams, hydroelectricity, than diesel ferries.
So called "renewable energy" is not clean; it is not sustainable; nor is it even "renewable." The land and material costs are outrageous.
The wind and solar fantasy was never about environmental issues, nor was it ever about reducing or eliminating the use of dangerous fossil fuels. It was, is, and always will be about attacking the last, best, hope of humanity, nuclear energy.
Have a nice day tomorrow.