If it can't be stopped, then we must assume that what could happen will. Like when someone shoots a bullet, and we observe the action in slow motion while the bullet is going, there is no way for the target to move out, and we must assume that a murder has been commited, even if the target is not dead yet.
So, in this particular case, a mass murder has been commited, and what we should do to put on trial the ones that shoot the bullet, and the same to the ones that intentionally hid the evidence (maybe taking out our chances to avoid preventing it).
And then, without them around keep trying to deny that there is no climate change, we may focus on mitigating the effects and avoiding to get worse without more interference.
So, in this particular case, a mass murder has been commited, and what we should do to put on trial the ones that shoot the bullet, and the same to the ones that intentionally hid the evidence (maybe taking out our chances to avoid preventing it).
And then, without them around keep trying to deny that there is no climate change, we may focus on mitigating the effects and avoiding to get worse without more interference.