You are right to worry; these things are insanely nonlinear, and we're already well into the meat of several feed-forward loops / tipping points (e.g., melting

You are right to worry; these things are insanely nonlinear, and we're already well into the meat of several feed-forward loops / tipping points (e.g., melting permafrost releasing gigatons of methane which is 22x as effective at blocking IR radiation vs CO2, melting of arctic icecap leaving open ocean absorbing far more heat vs white snow/ice, etc.). Worse yet is the threat that few are mentioning: the breaking of the food web. This incredibly delicate web literally keeps us alive and is under threat not only from anthropogenic climate change but also from everything from pesticides, plastic & microplastic pollution, habitat destruction, slowing and impending collapse of the Atlantic meridional overturning circulation, and 100 other scaled-up threats. We're already in the anthropocene era marked by the sixth mass extinction in the planet's history, and everything from fish to insects are nearing single-digit percentages of their pre-industrial populations. Disaster can be averted, but only if we take serious action. Good luck with that.