Mars is too small; exhausted its internal heat too quickly
Venus no oceans, no tectonics, no subduction, no lubricant – water
Subduction buries rock, some melts which –
Recirculates the rocks which contain the CO2 locked up in them, releases it back into the atmosphere where –
Plants draw it in, release oxygen, die and become fossilised containing the CO2
The oceans also act as vast carbon dumps as sea creatures and plants die and sink to the ocean floor; compression at depth
The moon is also essential to climate stability
On earth life pulled CO2 from the atmosphere and in dying became limestone
Chalk or coal locked it in and life took over the role of tectonics in the carbon cycle and keeps the climate stable!!
Earth’s activity shapes life but life also shapes it and is dependent on it.
As we are only now learning the climate is a fragile balanced system and human activity is oversetting that balance.