This. Carbon Dioxide in the atmosphere is basically the earth's thermostat. The amount of energy coming from the sun is constant. It must be balanced by the

This. Carbon Dioxide in the atmosphere is basically the earth's thermostat. The amount of energy coming from the sun is constant. It must be balanced by the thermal radiation leaving the upper atmosphere. But the more CO2 there is, the higher the elevation of that thermal radiation and the higher the surface temperature.