What do you take from the 60 Minutes episode on thawing permafrost being a major contributor of carbon dioxide and methane, greenhouse gases???
https://www.cbsnews.com/news/siberia-pleistocene-park-bringing-back-pieces-of-the-ice-age-to-combat-climate-change-60-minutes-2019-07-07/
So, this is the problem with most of climate science, and why it's so flippin' hard to determine how much warming will happen.
Everything depends on models, and each of those models have various things that will be positive feedback loops (warming begets warming) or negative feedback loops (warming begets cooling).
I.e. if warming causes the permafrost to melt, releasing more greenhouse gases, it is a positive feedback loop. If the poles melt, which currently reflect sunlight away from the earth, it is a positive feedback loop as more of that solar energy is retained in the earth.
But if warming causes more cloud coverage, clouds also reflect sunlight back into space, and that will mitigate the warming, i.e. a negative feedback loop. Although if I read
Wikipedia*, clouds can serve both purposes. High clouds reflect the earth's heat downwards, a net positive feedback, while lower clouds reflect the sun's heat upwards, a net negative feedback.
Generally if there is no net feedback to CO2, the warming will be relatively restrained. Most models assume a positive "climate sensitivity" number, which is effectively the degree of feedback inherent in the climate system. The issue with climate change is that nobody really knows the exact effects of these feedback loops, and whether there are enough negative feedback loops in climate to mitigate the worst positive feedback loops. I've heard people argue that the earth tends towards negative feedback [remaining in stasis], but given the various extinctions the earth has gone through in its history, I'm not sure I agree that we can't tip the balance. I'm just not sure if CO2 will do so.
That said, I agree with @CincyDawg that I'm a bit worried about the potential positive feedback from permafrost melt. Also that 60 Minutes can't be trusted.
* BTW I don't ever trust Wikipedia for politically-charged topics like this. I always figure they'll be captured by one side ideologically or the other, who will fight tooth and nail to skew the bias of the entry. However I highlight it here to explain the basics of positive and negative feedback loops and that both exist in climate.