Re: We already burn Hydrogen
I'm not sure why comments such as yours get a bad downvote/upvote ratio. If we figured out how to efficiently make gasoline out of atmospheric carbon and renewable/nuclear power, we could just keep using the current fuel infrastructure, engines and whatnot, and it would all be carbon-neutral or even negative (the stuff is easy to store, unlike hydrogen).
Granted, it's difficult and maybe too difficult, but it's not something that should be dismissed out of hand just because "hydrocarbons bad". I mean, we gave a serious go at biofuels, and that was patently stupid from the start.