Carbon Capture is yet another argument for nuclear. If the alarmists are right, it's already too late for us. Well, too late if we assume only natural processes to capture existing atmospheric CO2.
Real carbon capture, as in, mining the atmosphere for CO2, is the answer, but will take a whole lot of power. Perhaps close to the amount of power generated when it was released in the first place.
So, the only way to actually reverse AGW would be to suck CO2 out of the atmosphere faster than we put it in. Think of the amount of non-carbon electricity that would be required for that. A lot.
Nuclear is the only thing we have that could possibly do that.