You still have the problem that this is a textbook Public Good¹, and a textbook Collective Action Problem². As in, if someone pays $1B to decarbonize, the enti

You still have the problem that this is a textbook Public Good¹, and a textbook Collective Action Problem². As in, if someone pays $1B to decarbonize, the entire world benefits from it. So everyone is incentivised to make someone else pay for it. Empirically, things like these tend to be very underfunded. ¹ https://en.wikipedia.org/wiki/Public_good_(economics) https://en.wikipedia.org/wiki/Public_good_(economics) ² https://en.wikipedia.org/wiki/Collective_action_problem https://en.wikipedia.org/wiki/Collective_action_problem