PM KEVIN RUDD: Well, I just look at what the scientists say. There's a group of scientists called the International Panel on Climate Change - 4000 of them. Guys in white coats who run around and don't have a sense of humour. They just measure things. And what they say to us is it's happening and it's caused by human activity.
Now, it turns out there aren't 4,000 scientists from the IPCC.
UPDATE: More climate change style accounting from BOAB.