Here's where I am (or will be in few hrs).
Plan to say (1) there is a science of science communication; (2) it has assembled a good deal of data on why the public is divided on climate change; (3) what that data show is that the explanation is neither lack of scientific knowledge nor the inability to engage scientific information in a rational or systematic fashion ("system 2" etc); (4) what does explain conflict is motivated reasoning (cultural & otherwise); and (5) dispelling the conflict requires communication strategies that are responsive to this dynamic.
More later!
