Back of the envelope calculation says that one gallon of gasoline makes 20 lbs of CO2 when burned. One hundred gallons of gas per ton of CO2. I have seen sequestration costs of $200-$500 a ton for current CO2 sequestration or conversion to fuel hydrocarbons. This would work out to a $2 to $5 dollar tax for gallon of gas. So this would take us to $4 to $7 per gallon gas to create a sustainable CO2/hydrocarbon economy. For a lot of people, this would be better than spending an extra $20K+ for an EV. Twenty thousand dollars buy a LOT of gas. Ten to 15 years worth for a typical computer driving 10k a year even with the added taxes. Plus, this might make some places like New York, more politically open to oil/gas pipelines and fracking etc to increase supplies because gas/oil would now be green.