About 2 years ago the most probable scenario was 1.5° Kelvin until 2100. Now we're at 2.5° Kelvin.
If this is right, there's nothing we can do at all, as long as CO² is the sole factor. If it's not right, we should do what we can to improve our models and - most importantly - search for all possible factors influencing the climate.
The worst imaginable situation would be we're focusing just on CO² and then, just before extinction, realize the problem wasn't primarily CO² but methane, or atmospheric dust, or decreased albedo due to unknown effect, or whatever else.
Edit: as obvious as I hope this is, but nevertheless: we MUST do anything we can to reduce CO²! But we should definitely not forget to investigate other possible causes for the raise in temperature.
Do you have any sources for this? I'm pretty sure 1.5°K was never a probable scenario, merely the internationally accepted one by the Paris Agreement for acceptable damage control.
If this is right, there's nothing we can do at all, as long as CO² is the sole factor. If it's not right, we should do what we can to improve our models and - most importantly - search for all possible factors influencing the climate.
The worst imaginable situation would be we're focusing just on CO² and then, just before extinction, realize the problem wasn't primarily CO² but methane, or atmospheric dust, or decreased albedo due to unknown effect, or whatever else.
Edit: as obvious as I hope this is, but nevertheless: we MUST do anything we can to reduce CO²! But we should definitely not forget to investigate other possible causes for the raise in temperature.
Edit2: Corrections