Watch youtube video "How CO2 Saves the Earth".
https://www.youtube.com/watch?v=7H47-2DnnNw
While CO2 warming effects have raised earth's temperature to present levels, CO2's absorbed wavelengths are saturated. More CO2 will have reduced warming effects going forward. On the other hand, more CO2 increases collisions with O2 and N2 allowing those air molecules to release heat absorbed from conduction with the ground to be radiated back to space
Those cooling effects offset warming, reduce dangerous inversion layer heating, and maintain a balanced climate