When politicians and journalists declare that the science of global warming is settled, they show a regrettable ignorance about how science works.
Here's a very interesting article published a couple of days ago in the Times (U.K.). It is written by author, former editor of New Scientist magazine, and winner of the Kalinga Prize for the Popularization of Science, Nigel Calder, and he has some serious warnings for all those who have prematurely hopped on the global warming bandwagon.