Exxon knows climate change is real, they've just fought anyone else believing it.

https://en.wikipedia.org/wiki/ExxonMobil_climate_change_denial

And your implied claim that all climate scientists worldwide are paid for by gas corporations is pretty silly. If you pay any attention to climate science at all, it's obvious that climate change denial is only among the very small fraction of people who claim to be scientists and are directly funded by oil companies. All other climate scientists worldwide are independently agreeing on what's just obviously true given the evidence they've collected.