>Make non-compliance painful enough, and the defectors will fall in line.

Maybe they don't, or maybe in the end that's all too little too late, which is why I'd suggest adding adaptation initiatives to your list.

We're going to have to turn to adaptation initiatives even if we go net-zero-carbon tomorrow - that's kind of baked into our future planning at this point.

What if the defectors have more nukes than you do?

For a lot of countries it’s either emit pollution and feed people or don’t and let lots of people starve. Do you think your privileged life worth more than someone from third world who can barely afford to eat?