There are a lot of "who gives them the money" posts here - and on a basic level they're right.

But there's also the part where these companies were spearheading climate research initially - and instead of trying to pivot into renewable energy they doubled down on oil, muddied the waters in discussions by first denying global warming and then when that didn't work out anymore, emphasizing scientific uncertainty, lobbied against environmental regulations, and shifted blame to the individual.