I spent several years of my life in litigation over the arcane subject of air pollution modeling. I noted then the same thing I see now–the two sides largely talk past each other. the Greens talk in moral language and are disputed in the language of science. But science, by its very nature has no moral vocabulary, so it very speaks to the Greens. What did (and does) speak to them is competing moral language. that is why the Greens retreated in South Africa when confronted by opposition from the Third World that their prescriptions and proscriptions would further impoverish them.