Yep. Don't you have to burn a lot of coal or natural gas to generate the electricity to make the hydrogen? Of course nuclear power would fix that part of the equation.
the worst part is that even if this 'fantasy world' of combustible hydrogen power was feasable, it couldn't work. the left is promoting this as a way to slow down global warming. the most potent 'green house' gas known to man is water vapor. what comes out of the pipes of these "eco-friendly" cars? if every internal combustion engine was coverted to hydrogen tomorrow we would all be dead in a matter of years.
Yes, but you can also use solar energy. Do a search on 'Solar Water Splitting'.