It is interesting to note what President Obama has to say about climate change, especially when he addresses the skeptical Republicans:
'I know that there are those who disagree with the overwhelming scientific evidence on climate change. But here's the thing -- even if you doubt the evidence, providing incentives for energy-efficiency and clean energy are the right thing to do for our future -- because the nation that leads the clean energy economy will be the nation that leads the global economy. And America must be that nation.'
Of course, good science is important. But climate policies, be it mitigation or adaptation, do not exclusively depend on 100 % scientific evidence. There are other arguments for both mitigation and adaptation, and there are other powerful mechanisms at work - such as nationalist interests. Climate policies don't stand or fall with IPCC reports or other scientific evidence; there are many cultural, economic and political reasons for adaptation and mitigation. Of course, the conflicts about manipulated data and conflicts of interest have to be solved; but the future of the world does not depend on these mostly inner-scientific conflicts, nor do climate policies.