Serendipitously came across this on a mailinglist (UnCiv), which gives a practical example of using increased diversity of life as a coolant, as described in Novacene. Although this farmer in Portugal fears he might be too late.
A farm in Portugal is showing how the ancient art of silvopasture – combining livestock with productive trees – may offer some real answers to the climate crisis
The tree of life is not a tree but shaped like this. Read this article which puts archaeons on the right hand branch, bacteria on the left, and us with all other eukaryotes as a result from a unexpected joining of a bacterium into an archaeon.
Lovelock mentions this in Novacene, where he basically uses this to support his thesis that on the known universe’s timescale there is too little time for alien species to have evolved. We are alone he says.