The problems with science are mostly in the heavily-commercialized industry-linked sectors, namely biotechnology and experimental psychology. The point being that when discussing "science" as an institution, it is appropriate to be aware that it is heterogeneous with respect to many factors, including fundamental focus. That one field of science may have its problems does not automatically condemn every other field of science.And yet we are supposed to adhere to the constant appeals to authority in regard to global warming... What a mess.
As for authority claims, the only lesson to be drawn here is what we already knew, which is to not take sensational claims based on very little research at face value. So, if you skim through a pop-psych article on CNN that goes, 'a study/experiment shows that...', be suspicious. But that's nothing surprising.
As for global warming, well, in that case you'd be dismissing not isolated studies or potentially-shoddy research but literally an entire field of scientific endeavour, so that you might as well dismiss the accumulated human knowledge of human anatomy, or even classical mechanics.