Frankly, the world as we know it is going away, soon.

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210. OK, fair enough.

It's been a while since I've done any stoichiometry and I'd forgotten that combustion would have to remove the oxygen from the air. In fact it seems that I had heard that before, and I feel a bit foolish for having forgotten it. Although, I'd like to point out, your link doesn't perform the full balance (neglects the mass of the hydrogens in the fuel, assumes a gallon of gasoline is pure carbon); I will acknowledge that the exhaust is heavier than the gasoline itself.

However, the point is still valid. Coal power plants can be equipped with scrubbers to reduce the amount of pollutants and the pollutants that are removed can be incorporated into other products (concrete or sheetrock for example). Capturing all of the CO2 on board a car would still not be an unrealistic thing to accomplish. It would be the equivalent of carrying a person and his/her books.

Even carrying a little water on board to discharge with the CO2 so that it was swept away in the storm sewer system would reduce the buildup in the atmosphere.

The point is: so what; if a tank of gas exhausts 250 lbs of CO2; there is still a solution.

I was wrong, it happens, I thought the Metric system would catch on too. That doesn't mean that the solutions aren't out there.

BTW, here are those videos (whether you're interested or not).