The ozon layer has partitially been destoryed cooling. However there is a lot of CO2 in the atmosphere heating. Shouldn't we reach an equilibrium Is there a connection between the two effects?

Answer 1

well, the ozone layer being depleted does not cool off the atmosphere. Quite the opposite actually. The ozone layer protects the earth from harmful radiation from the sun. Radiation such as UV radiation that contributes to: sunburns, skin cancer, and heating of the atmosphere and ground. Carbon Dioxide CO2 does heat the atmosphere like you said due to it's greenhouse effect. This effect occurs when radiated heat from earth tries to escape into space, but is stopped and reflected back by a barrier of CO2 (similar to what happens in a greenhouse with the glass being like CO2). So your answer is NO. Those two effects cannot cancel each other out.