The oil companies are generally working on carbon capture that produces CO2 that can be sequestered with the equipment and know-how they already have (i.e. pump

The oil companies are generally working on carbon capture that produces CO2 that can be sequestered with the equipment and know-how they already have (i.e. pumping pressurised CO2 back into underground reservoirs). Growing crops is one of their focuses (and it's not a very good form of carbon capture, anyhow).