Well, obviously climate change denialism is the fraud. There's billions to be made for every year of delaying action. By some people of course. The rest of us will lose trillions in the long run.

There's billions being made from promoting the idea of a climate crisis. If you go down the road of "anyone with financial interests can't be trusted", then the number of people you can listen to is very small.

Fortunately there are a few. Climate crisis skeptics are mostly pensioners who take down bogus science for free, as a retirement hobby. It's about as close to the platonic ideal of a neutral third party as you can get. Look into them, you'll see for yourself.