That a group of nonprofits and academic institutions all colluded over a decade or three to make money in a very roundabout way for groups they don't have any direct involvement with?
-or-
That a group of oil industry types, in a nod to the junk science used by big tobacco for years, colluded over a decade or three in an attempt to discredit something that will directly impact their bottom lines in a bad way?
Follow the money. Hell, follow human nature.