This is a problem of hundreds of gigatons of a gas affecting billions of people over the course of decades across the entire planet. When you wrap your brain a

This is a problem of hundreds of gigatons of a gas affecting billions of people over the course of decades across the entire planet. When you wrap your brain around that scale and mechanism you simply cannot apply a notion of "too late" to a set of scalar function that massive. That is a false-dichotomy, or more accurately a depressive form of "splitting".