Well you can only do so much, and a denier will come and fuck everything up. Oil and coal companies will pay billions to keep the propaganda going - that the earth is just fine.
So tired of all that. Remember the CFC issue. World got together to fight it and it worked. I don't know if we will ever see such cooperation again. If we do, maybe we have a chance.
Other than a uniform collective action as a species we have no hope to turn this around. And since I don't see that happening anytime soon I would rather stick to my "Doomerism".