Originally Posted by JinnKai

Fine, fine.. delete the word fossil.

I will deign that running an electrolysis car off of solar energy WOULD be effective.

You're still expending other fuels. My argument was thermodynamic, not practical. I realize that you can't really consider sunlight as a "depleting" resource in the conventional sense. My primary argument is that most people advocating "water cars" don't understand that it is truly "electrolysis cars" and that that electrolysis requires another energy source. Solar powered "water cars" are the ONLY subset of "water cars" that would be economically viable.