O.K. Clark, I’ll try and do something I am not good at, I’ll try and be succinct. About one hundred million years ago there was an increase in Angiosperm Biodiversity and Forests. Then came along the KT Event.
This killed out the dinosaurs, so they could no longer feast on the tree leaves. This allowed the Angiosperm Forests to explode.
The Biodiversity of the Angiosperm Forests are much more three D, than the Gymnosperm Forests.
This moved to a fuller environment, with greater uptake of Carbon.
The Angiosperm Forests drew down vast quantities of Carbon, this moved the World to have the smallest quantity of Carbon dioxide in our atmosphere – ever. C4 plants then turned up, able to need less water and less Carbon dioxide.
The Industrial Revolution has put some Carbon back into our Atmosphere.
No doubt more trees and shrubs will take in more Carbon
and things will even out.
Personally, I do not think there is a climate emergency, it is hype.