A vast majority of scientists who study climate change agree that there is a problem. There is now overwhelming evidence that climate change is real and it is already affecting the planet in many ways. I think that the UN needs to find some respected scientists to speak out on climate change to plead their case.
I do not think it would be feasible that the UN could compel Annex I states to increase aid. Climate change is unfortunately very much skeptical at the moment. There is no great proof either way. Seeing as there is a lack of proof, I do not see the UN effectively compelling Annex I states to increase aid.