But you have to get the hydrogen from somewhere, since it's not naturally occurring (i.e. you can't just dig it out of the ground like coal or put uranium close to more uranium like nuclear) you have to make it. Making it takes energy (more energy than you get burning it) and/or releases the waste products your trying to avoid in the first place.
Most hydrogen is produced from fossil fuels.
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Uncertainty is an uncomfortable position.
But certainty is an absurd one.
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