re: "science policy"
Science policy is where politics and science merge. What I have trouble convincing anyone of is that this has exactly the same dangers and should raise the same cautionary flags as when commerce and science merge.
For political entities, national and international, there are billions, perhaps trillions of dollars and enormous political power riding on AGW right now. This doesn't make AGW wrong, but it wouldn't suck to see at least a tenth the skepticism that might be generated by a cigarette company study on how safe cigarettes are.