There's no need to put the calcium carbonate back in the ocean. Calcium carbonate is limestone. The White Cliffs of Dover are limestone, and they've been there

There's no need to put the calcium carbonate back in the ocean. Calcium carbonate is limestone. The White Cliffs of Dover are limestone, and they've been there for millions of years. Keeping the fuel underground would have been nice. Now the CO2 level is already too high. As you pointed out above, we have to stop emissions and pull CO2 back out of the atmosphere.