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[–] 3 pts

I'm sure it's possible to make the process cheaper or more efficient than it currently is, but it really is impossible to get more energy out of burning the hydrogen than you put in to separate it from the oxygen in the water.

Hydrogen cars may turn out to be better than electric cars but they suffer from the same basic problem, they just store energy from another source, rather than produce it on site like a gasoline engine.

[–] 5 pts

Hydrogen is actually a shitty fuel for cars due to its low energy density. We won't even go into the difficulties that arise in handling it. Batteries probably make more sense than hydrogen ... and batteries don't make any sense at all.