[parkingrift]

We will need many scientific breakthroughs for battery to be viable for non-personal transportation. Then there’s industry, construction, agriculture, etc. These areas of the economy are responsible for about 50% of emissions. We need hydrogen. Not for cars, but for everything else.

[antoinexp]

"Not for cars, but for everything else." While I agree with you there are some usages where it does make sense and shouldn't be neglected, it is also worth noticing that the current consensus on Metaculus is an estimate of 6% market shares for those usages in 2030: https://www.metaculus.com/questions/552/fcevs-vs-bevs-what-p...

[Edit] consensus established in February 2020

[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.