Re: so.what do we do....
...Fair cop, for some reason I confused 20,000 for 12,000, mea culpa (in my defence I mention 12,000 above, a case of mathematical dyslexia I fear). But you've not really answered anything, the fact remains that of any papers that expressed an opinion on agw, 97% agree with a human cause...
I'm sorry to hear that you have mathematical dyslexia. But really, if that is a problem for you, you should not be discussing statistics...
Luckily, I am able to help you with some of the sums. Very little information is given (which is suspicious in itself), but here is the basic data which can be gleaned from the figures given.
Papers by 8547 authors were studied, marked, and then the authors were asked for their comments.
Of those authors, 1184 replied.
Of that 1184:
786 said they had no position
412 accepted AGW
47 rejected it
24 were not sure
So, in total, out of 8547 authors, 412 cared about AGW sufficiently to say that they supported it. I make that around 5% of all authors.
However, if you just take the 412 and the 47 as the only 'important' people, you can say that around 90% of 'the scientists who expressed a preference' were for AGW.
Myself, I would say that the main finding was that 95% of scientists didn't think that responding to this survey was very important. You might hazard a guess as to why - I have no opinion...