"American companies" smh, let me introduce you to "The City of London", not to be confused with London the city in England.
https://en.m.wikipedia.org/wiki/City_of_London
The UK has a metropolitan region called "The City" (of London) where banks get to basically play without rules. It is for that reason the financial capital of the entire world.
The UK has a square mile dedicated to white collar crime and fraud and it exists because the international wealthy were more powerful than the monarchy ever could be, let's not pretend Americans are the ones who gave up. This is a very long, very old battle - older than America the nation itself.
Given the climate (pun) of politics at the time he was alive and playing that role, and given that hindsight has taught us An Inconvenient Truth was more political than it was based in science, and given that Crichton's argument was that environmentalism had to be apolitical in order to ever be effective .... yeah I'm not a climate change denier but neither was Crichton.
Crichton was a Democrat. And he was right, Al Gore's movie was about fear-driven politics, not actionable goals and plans.
Go look at how climate scientists described that movie. "The basic truth and it's inconvenience remains" one researcher was quoted saying. Tacitly admitting everything beyond the basic truth of the film was inaccurate. Go on, check out what retrospectives have to say about it. There's a lot of em.
Again, Crichton was right, and he was absolutely not in denial of climate change. He was against using social problems with scientific solutions as political ammunition in the fear cannons.
Bottom line is any time someone insists a complex problem has a solution as simple and clear cut as "vote Democrat", they're wrong. More wrong than they are right, especially given any timeline longer than 4 years. And that's exactly what you're doing here. "Crichton deviated from the party line on the environment ergo he's just a 'denier'". There's far more nuance in this life than that.