You also have to remember the costs of capturing CO2, which is best done at the points of emission, and transporting the CO2 to the (usually far away) storage s

You also have to remember the costs of capturing CO2, which is best done at the points of emission, and transporting the CO2 to the (usually far away) storage site. OTOH, the total cost (not just for sequestration) is about $100, maybe a bit more, in most estimates. For reference, a gallon of gas produces 20 pounds of CO2, so $100/ton equals $1/gallon of gasoline. That's roughly what you'd have to increase gasoline price by to fund CO2 capture, transport and storage. (This neglects that the capture part is neigh-on impossible.) For electricity, to compensate for the average US CO2 emissions per kWh (~1.2 lbs/kWh), you'd have to increase the price by about 6 cents per kWh. To do CCS for both gasoline and electricity consumption, the average US family would have to pay (order of magnitude) 1000 x $1 + 12000 x $0.06 = $1720. That would compensate for about half the family's CO2 emissions. The remaining half is dominated by emissions from the food we eat, the stuff we buy and from having fun.