Hydrogen cars would be a really poor idea, since there is on average around 55x as much water in the atmosphere than there is CO2, even these days...
Noone's mentioned the fact that it's not just production of CO2, but also the destruction of great CO2 eating beasts - trees - that would cause the increase. So, no more breathing, fossil fuels, or wood.
[conspiracy theory]The powers that be know that we're running out of oil (
www.lifeaftertheoilcrash.net) and want to make it fashionable, and filling everyone's head with doom & gloom now would make it much easier to transition to other technologies. Besides that, with a oil crisis looming why would we (developed nations) want to allow nondeveloped nations to industrialize and use up our technological lifeblood?.[/conspiracy theory]
To whoever said something about "the experts"... It's awfully ironic to call someone else naive when you think that "the experts" are giving you an unbiased (read: unpaid) opinion. There are plenty of "experts" who disagree with the theory as well, but they're not paid serious $$$ to have their expert opinion plastered on every dirt rag in sight.
Again, I have no problem with cleaning up. And certainly since we do generate SOME CO2, it must therefore have SOME effect. Numbers wise, it seems dreadfully insignificant - 3 to 4 hundredths of a % of C02 in the atmosphere, compared to up to 4% water which is more effective, the whole volcano thing again, solar activity, blah blah blah. As far as "knowing the facts", you only "know" what you're told, and that by the "experts". I'm sure you think the news is 100% undiluted unaltered fact too right?