[stupendousyappi]

There are several others. I'm not a climate scientist, but my understanding is that the most significant potential negative feedback loop by far is the potential for increased cloud cover from increased humidity. It's evidently the most difficult aspect of global warming to model, although climate scientists are making continuous progress. In addition, the marginal radiative forcing of CO2 decreases with its concentration, which means both that increases in emissions do less harm as things get worse, and that reductions in emissions do less good.

[raducu]

So, when is this negative feedback loop supposed to kick in and save us from global warming and climate change?

[ncmncm]

It is already "kicked in", and all figured in, is not saving us, and will not save us.