CO2 reduces the viscosity of oil, and helps get more oil out of the oil well. Even ignoring climate benefits, it's still worth pumping CO2 down the well for fi

CO2 reduces the viscosity of oil, and helps get more oil out of the oil well. Even ignoring climate benefits, it's still worth pumping CO2 down the well for financial reasons alone - especially towards the end of the lifespan of classical oil wells.