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Hydrogen is not so much a fuel, as an energy storage system. It does not occur naturally (as H2). You have to dissociate water to get it.
That said, some sort of energy must be used. That will have to be Nuclear. No real other choice.
Final problem: Hydrogen is extremely dangerous. The flamability limts range from 5% Hydrogen, 95% air to 95% hydrogen, 5 air. Hydrogen also is not a normal gas. It has a reverse Joule-Thomson effect when expanding: It heats instead cools. Under high enough pressure (and not that high), it is self igniting.
Fun stuff.
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James
The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994)
Red-beard for President, 2020
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