Oil, coal, and gas companies. They are the ones who benefited by the denial of climate change.

If I had to guess I’d say some corporations specialized in fucking up ecosystems bribed him. As a result they will enjoy a short term increase in profits (or at least in stock market valuation) from being able to conduct business unchecked.

Just follow the money..

Oil

The oligarchs know full well what’s happening, course. Before their strategy was in buying the narrative - e.g. scientists don’t all agree on this (cos we funded and amplified two crackpots), or “we’re actually still in an Ice Age”, or “how to reduce your personal carbon footprint” - but they also know there’s going to be a tremendous amount of anger and upheaval when critical systems of human society start to break down and they don’t want any of that righteous ire directed at themselves.