[willis936]

Find the societies most affected by Global Warming the soonest, between the tropics is the safest bet. Pick the one with the largest GDP because they have the largest ability to geoengineer.

Do you think that a political leader from there will ask global permission before doing this? Do you think a political leader from there could make any other decision when the society is facing an existential threat?

It's naïveté. This needs to be researched much more than it has been because the illusion of choice will be gone sooner than you think.