> bury it in deep basalt where it will turn into limestone CO2 + Basalt !== Limestone Limestone is the fossilized remains of sea creatures. Wikipedia says:

> bury it in deep basalt where it will turn into limestone CO2 + Basalt !== Limestone Limestone is the fossilized remains of sea creatures. Wikipedia says: "Calcium released by basalts binds CO2 from the atmosphere forming CaCO3 acting thus as a CO2 trap." https://en.wikipedia.org/wiki/Basalt#Geochemistry https://en.wikipedia.org/wiki/Basalt#Geochemistry CaCO3 is indeed the principal component of limestone, but not all Calcium Carbonate is limestone. I have no idea whether the process of basalt binding CO2 is efficient; WP doesn't detail the process. Nor does TFA; and I'm not surprised, because Oxy's goals are completely orthogonal to the production of CaCO3.