The IPCC forecast seen below tells the tale of how the next 50 years will play out in climate action. There’s going to be a demand to remove 50 gigatons of carbon emissions through abatement (wind, solar, renewable fuels, energy efficiency, and so forth), and 20 gigatons per year through direct CO2 and methane removal. Assumes of course that when the Arctic melts that we won’t have a catastrophic release of methane a topic for another time.
First of all, let’s do a value exercise. Adding up the carbon price in California these days, you get to $275 per ton, more or less. California has a market-based approach, demand and supply keep the exact number jiggling around a bit, but that’s where it is, ballpark, these days. That’s mostly for transport because most of the actual emission-reducing legislation has been aimed at transport for reasons of energy security as well as emissions.