Quote:
AdmiralMartin said:
Who needs gas? What we need are Water Powered Cars 
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Just one little thing about that: How much energy does it take to run the electrolysis process to separate water into it's componant oxygen and hydrogen? That is the amount of energy that would be released from burning it. Thus it is a no-gainer, just putting the job of generating power into the electrolysis phase.
Can this still be a useful invention? Sure, it could be thought of a volatile form of battery, storing power to be used later.