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Hydrogen may have a part to play in an overall transport strategy, but I'd bet it'll be a small one.
It's been said time and time again, Hydrogen is less efficient for personal vehicles, you're having to use energy to convert hydrogen into electricity to store in batteries/cells, cut out the middleman and just put green energy straight in the battery.
As for battery fires, when it's not some knock off product, a battery is much less likely to catch on fire, sure it'll be harder to put out if it does, but it's less likely to catch fire in the first place than driving round with 60L+ of flammable liquid. All stuff proven with data, but really seems to upset the short of thinking.
As I recall, hydrogen is mostly made from fossil fuels. Turning water into hydrogen isn't straightforward IIRC.
I'm not anti hydrogen as part of a strategy, but it's not a dead simple switch.
The argument that we won't have enough electricity to power EVs... but we WILL to create the same amount of energy from creating hydrogen is so bizarre to challenge belief.
The world has chosen battery EV as it's new vehicle technology, just as it chose ICE over steam and yes... primitive battery EV many years ago.
Why are we still banging on about Lithium shortages when sodium cell gigafactories are now in production and the first sodium powered cars are on the market? There are other even better technologies in the wings, battery tech is finally going places.
We need a lot more cycling, a lot more walking, but you are trying to convince a nation of obese people who love their cars more than their kids in some cases to give up said cars and run their butts around - in sure and certain knowledge people like them will be trying to kill them every day for the temerity to be on the roads and not doing 60.
It's EVs or no net zero.
China has a significant lead over the west now in many, if not most, manufacturing technologies. They used to build things cheaper than we did, now they just plain build them better.
The only reason all the counterfeit stuff comes from the Far East ... is because everything does.
I think your point is slightly missing something. People don't like change because they want to swap 1 thing for a direct replacement. But change often requires many things to change.
Change isn't swapping X for Y. If it was then change would be much less scary and not really much of a change. Change is deeper, and I think that's where people are going to need to wake up.
The advance of technology always has the elderly foaming at the mouth.
I'd argue many should have trains on them again, but no reason there couldn't be cycle paths built alongside.