The incentive for anything like this should be the profit that can be gained by the direct storage of the CO2. Carbon taxing the world sound like a Al boar wet dream. There is nothing stopping any country from sequestering CO2 except for the cost of doing so. Also add Less production of goods, less jobs and more costly regulations. Also like most governments you can be sure the regulations will not be even handed. China and counties like them will get a pass, and developed countries who by and large are already under some form of emission controls will pay the dearest. The only benefits I see are to those who can control the carbon foot print regulations and the swaps.

I'm predicting, based on documented botanical considerations, that if this practice of sequestering carbon becomes widespread a time will come when humans will find themselves suffocating for lack of oxygen. Most of the oxygen in our atmosphere is produced by ocean algae that feed on atmospheric CO2.