I think you nailed it. However 'Planning for failure' breaks down in a future with economically viable carbon capture. What happens when nations are 'un-aligned

I think you nailed it. However 'Planning for failure' breaks down in a future with economically viable carbon capture. What happens when nations are 'un-aligned' in how much carbon should be in the atmosphere/ the total globe. If it makes India a rainforest with a certain level of carbon, but makes the US a desert, how do you decide the optimal level of carbon PPM?