[panick21_]

The only thing we need hydrogen for is for chemical industry. And that is enough demand already for hydrogen production plans.

Beyond that you don't need it. Not needed for the waste majority of the things you suggest.

And often there are better solution then using hydrogen directly. For remote construction sites, just turn your hydrogen into anther syn fuel like methanol and run a conventional generator to power electric construction methods.

Hydrogen will be a niche use-case in all the areas you mentioned. And there are so many more important things to do.

For example, for construction, electrified railroads transporting all that gravel around rather then diesel.