I'd argue that science behind global warning is still unclear
after reading a good number of papers on the subject
I don't argue it's not getting warmer, I believe humans plays a (possibly big) part on this (not sure on exact %), but the whole models behind climate are far from clear-cut. You can twitch the parameters and get vastly different results, and scientists themselves say they don't understand everything.
So yes, it's unclear. And while a minority, there's still several people that have different results and NOT unrespectable.
And I don't think it's that good a thing to tell people that science is a sure thing.
(On GMO, I'm sure there's definitively nothing wrong with them with the technique, but I'd say the most common sold Monsanto variant, and the fact that it allows an heavy use of round-up and the like, is definitively not healthy)
So 1+1=2 is an opinion now?
It sure isn't a scientific fact unless you define 1, 2 and +.
Even in maths.
1+1=10 for addition in base 2
1+1=0 in Z/2Z
1+1=1 in boole algebra
...