AFAIK, all the climate projections could be wrong and we could be heading for another ice age that is only being delayed by our production of green house gases. There is really no good way to be 100% sure of the projections either way. That being said, we need to reduce how much we rely on non-renewable resources, and quit pumping garbage into the atmosphere, it stinks and it makes breathing difficult.
In my view, the extremists on both sides of the issue are just as stupid. It's kind of like politics, the extremes are where the morons go, the moderates are where smart people go.