I think the world need to shift the debate of Global warming to Global pollution which is a much bigger threat to mankind because we could be seeing an end of a civilization within our lifespan.
The last 100 years especially after human civilization started industrialization, we have been exploiting the earth resource to the tilt. As a result, the damage to the earth eco-system has been so devastating by the current civilization that even the resource utilized by our ancestors for the past 4900 years combined to sustain their civilization pale in comparison.
I think it is too late to save the world..the seed has already been planted when human think they can conquer nature. Since industrial revolution started, human being has the mean to plunder all the worldly resources, killing record number of living species and driving them to extinction. For the last 200 years, human being have used more resources by drilling more oil, digging more minerals ,cutting more trees and killing records number of animals/fish for food.. What we have exploited in the last 100 years is more than what our ancestors have used for the last 5000 years.. Something is going to give within our lifetime, the pollution and more natural disasters will make sure we die a terrible death. It is a collective karma we have to suffer .