"for what purpose? "
That's easy, to protect established, vested, economic interests that rely on maintaining the status quo. It could be argued that there are competing interests who want to displace the status quo and are conspiring against it, but they certainly don't have the economic and political power held by the current financial-industrial regime now in place. The organization, funding and leadership of this alleged new climate change conspiracy is entirely speculative, and at best, preliminary. The resources, motive and organization of their opponents is an established fact.
In fact, I submit the former is entirely a fabrication of the latter. That is the explanation that best fits the fact.s