"I'm afraid the scientific community has succumbed to politics.
"
Considering that the vast majority of "studies" we seem to read about come from grants, I'd say that the politics of the grant giver play a significant role in the outcome of the "study". Kinda like global warming. Not a shread of scientific proof but everyone seems to say, "Every knows there is global warming, why else would everyone be saying it's true?"
The earth is getting warmer, of that there is little doubt.
Now, did man cause it, and can he stop it? That is the crux of the matter.