It's interesting that no one has mentioned the hard time Jim Hansen got in the 80's when he first claimed he had found evidence of AGW. Here's somthing I wrote back on 1992 about it all: The Bush administration added; This changing of Hansen’s testimony became the centre of a large scale public debate with Hansen in the middle. As Hansen had been in the press the year earlier over something he had said the members of the opposing camp did not believe the Bush administration had acted unfairly. On June the 23rd of 1988 Hansen made his famous “99% confident” speech. In front of the Senate Energy Committee, television cameras and journalists he said; All very good for the journalists and exactly what the environmentalists wanted to hear. But as a scientist he had gone too far. Hansen claimed that “the greenhouse is here”, although most of his colleagues and fellow researchers are not so sure. Michael Schlesinger, at Oregon State University questions Hansen’s confidence,’ Tim P Barnett an oceanographer at Scripps Institution of oceanography; At a conference on climate at Amherst, Massachusetts, it was said; W. S. Broecker in Hansen’s defence claims that Scientists like the attention the greenhouse effect is getting on Capitol Hill, but they shun the reputedly unscientific way their colleague James Hansen went about getting that attention. Was this declaration straight from the heart or was it a cold calculated manoeuvre, made in order to encourage the inherent scepticism within all scientists? The climatological research world was now looking to prove Hansen wrong, to put him down and discredit him, but in so doing they may turn up the evidence which can be described as “99% confident.” The theory of AGW has had a tough ride over the years - to say that it has not gone through rigourous testing is, quite frankly, nonesense.