Important piece in the puzzle #RCPcollapse
https://www.nature.com/articles/s41893-020-00603-4
or https://trophiccascades.forestry.oregonstate.edu/sites/default/files/Hayek2021.pdf ,
"The carbon opportunity cost of animal-sourced food production on land" #Hayek et al 2021
When all animal pasture and crop land currently in use for animal agriculture are rewilded, the process removes a total of
358 to 743 GtCO2 from the atmosphere by year 2050.
-743 Gt CO2, that's the theoretical equivalent of 0.5°C. ^^
The CO2 removal is based on the biomes originally covering the land nowadays in use for animal agriculture.
Ecosystem soil and litter could remove an additional 225GtCO2, "but this estimate is highly uncertain".
Albedo changes were not included in their modelling; but they say, regrowth of temperate forest systems increase temperature locally – but globally, they net cool despite albedo loss.
"Carbon uptake saturates after around 25 years for tropical forests
and around 30 years for temperate forests." Good to know. I had guesstimated this takes 60 years.
From what I can see, they computed only the rewilding process, not the CO2-equivalents GHG emissions like CH4 and NO2.
But reductions in those are maybe balanced by increased microbe activity via changes in hydrological cycle. So I won't bet on additional temperature decrease from them.
My proposed #RCPcollapse scenario research has to include rewilding in all the settlements and agriculture land in the highly tech-dependent societies, and in cities in all societies.
Also, outgassing from land and ocean once CO2 concentration drops reduces the effective atmospheric drawdown from 743Gt to 558Gt CO2.
Still -0.4°C.
-0.4°C within 30 years or so.... from the end to animal agriculture alone.ß!
Shocking. But to remind myself: from 2005 to 2020, global °C rose by 0.4°C.
Finnish forests are shifting from carbon sink to carbon source. 
Read more: 
Greg Cocks 
