But the fact also remains that it's going to be the poorest who have had the least impact and can do least to avoid it, because those with money and power will be able to go where they want and escape the choking pollution and poisoned watercourses and floods and landslides and droughts and wildfires, until it affects them directly and unavoidably they'll carry on making the right noises and doing as little as they can get away with.
You may or may not be right about the 1.5degC increase being avoidable but.....