"In summary: Although CO2 has less effect at higher CO2 concentrations, this "logarithmic effect" will be overpowered by these 4 factors if we don't switch to

"In summary: Although CO2 has less effect at higher CO2 concentrations, this "logarithmic effect" will be overpowered by these 4 factors if we don't switch to clean energy quickly: * Exponential growth of energy use * Past CO2 emissions that nature has not yet absorbed * Carbon sink saturation * Committed warming"