yeah angech says: October 9, 2018 at 9:54 am Children. 1. “Although CO2 absorbs thermal radiation from the Earth, it emits more. Carbon dioxide is in thermal deficit in terms of radiative balance.” No. CO2 is not the sun. It is not an energy production molecule. CO2 absorbs energy, from LW or from collisions. It releases same. It cannot emit more than it absorbs in a re-energising environment [energy from the sun. angech says: October 9, 2018 at 9:58 am Children gymnosperm says: October 8, 2018 at 3:34 pm “Trouble is, you’re both right.” We have the problem that Roger believes that all is due to Pressure, gravity height and Brandon that CO2 causes all the fuss. Impressive scientific arguments for both sides. Let us call it a draw with some acknowledgement of Brandon’s argument [yuk]. angech says: October 9, 2018 at 10:05 am The reality is that pressure, gravity height acting on a body of air of known composition does, must determine the temperature[s] of said body of air. Indisputably. However said body of air will differ markedly if its composition included greenhouse gases of any variety, including CO2. Not exactly noted by Nikolic but not disputed by him either. In other words the heat retaining capacity of CO2 alters the temperature and the height at which CO2 emits to space. It does not happen in a vacuum. The O2 and N do heat up by collision and receive and transmit energy by collision to and with CO2 molecules. You are both right. Yeah, as my teenage son would say. Acknowledgements welcome.