Co2 follows warming in the atmosphere is an oft quoted message
This led me to thinking about the known causes of heating for the land sea and atmosphere . The atmosphere at both sea level and higher.
Some atmosphere of course as in mine shafts and deep earth valleys is actually below sea level and help add some insight into heat movement in air.
Starting from the center of the earth there are the more obvious nuclear reactions in the core and mantle. There are less obvious atomic reactions due to the vibration of atomic particles causing friction. Then there is heat generated by the increasing pressure of gravity as one moves towards the core. These are possibly exacerbated by the gravity changes of a rotating moon in competition with the sun and to a minute extent by the other planets and space matter including any from the sun.
An obvious cause of heating is the wave motion in the oceans especially when hitting the land and along the sea bottom. The friction here generates a significant amount of heat every day [24 hours]. In fact one could say that if the temperature is hot enough to sustain liquid water there will always be heat generated in excess of that needed to heat the water in the first place.
Gravity waves in land cause the same friction and may also cause the land to heat up at all levels all the way down to the core.
All this without needing any heat input from the Sun at all. When we talk about the earth being _ 30 degrees centigrade without green house gases are we taking all these other effects into play or are they so minuscule that they do not count at all.
with respect to the CO2 question is a warming world releasing more CO2 into the air because of the warming or taking more out because there is more biomass created to use it up.