Set the price to be 2x the cost of direct air carbon capture, then put the money in a fund that pays for cheapest environmentally responsible capture first.
This would lead to ev’s and heat pumps being drastically cheaper than older technologies.
While they’re at it, federalize the price gouging oil companies. We have signs at gas stations run by international megacorps here in California complaining that we have the highest fuel taxes in the US. The taxes are listed on the pumps, by law.
If you subtract them out, and compare the results to other states, you’ll find that we’re being price gouged dollars per gallon by the industries.
(The excuse for this is that there was months-long supply chain shock 20+ years ago. Of course, the prices never went down after that shock…)
Anyway, screw them. We have EVs now, and as bad as PG&E’s rates are, it’s still saving us hundreds of dollars a month.