Nothing in science has ever been 'proven', barrie...I guess that that's how almost 40% of Brits still believe that the earth is only 6,000 years' old, and that Evolution is 'nothing more than a theory'...
Now, I'm in no way suggesting that AGW theory's resistance to falsification is anywhere near as robust (Clearly it might still be shown to be false!) as Evolution by Natural Selection's clearly is. But the evidence (not the hot air - that floats!) is slowly stacking-up...
On the other hand, and hats off to hard-working sceptical scientists everywhere, if someone successfully refutes AGW theory, I'll be among the very first to congratulate them!
Of course. Dr Doll was a patsy...