Academic bias has seen to it that scientific studies are funded on the basis of political correctness.
If your study counters the socialist talking points on global warming, you are seen as “the enemy”.
Al Gore would not shy from a debate if he had the facts. They would not deny the very EXISTENCE of all dissenters in the scientific community if pro-global warming theory people had the facts to counter the research.
Too many examples of data being fudged or even supressed when someone else wants to investigate/review/repeat man-made global warming studies.
Not to mention gov't grant money! ;-)
Sadly, the global warming rule of politically correct science operates in all areas of science including medicine now. It is going to slow progress in science big time.