doubling the concentration of atmospheric co2 from its pre-industrial level, in the absence of other forcings and feedbacks, would likely cause a warming of ~0.3â°c to 1.1â°c
doubling the concentration of atmospheric co2 from its pre-industrial level, in the absence of other forcings and feedbacks, would likely cause a warming of ~0.3â°c to 1.1â°c
global warming:58
increased concentrations of gases such as co 2 (~20%), ozone and n 2o are external forcing on the other hand.