The problem is that by the time it becomes incontestable that the scientists were right, it will be much, much too late to do anything about it.
We will be spending much of our upcoming years trying to get people and capital to accept that fact, before we can even start thinking about what little we can even do. By which point, we may actually just be having to scramble to mitigate the immediate sequelae of the changed climate, rather than focus our efforts to fix the underlying cause.
Depending upon timing, if the AOC shuts down, Europe may not be a bad place to live. I am not sure how the AOC will impact NE US and Eastern Canada. But between the 40th parallels could be borderline uninhabitable for humans.
Way things look now, we seem to heading straight to +3C and maybe even +4C.