He was...and gone too soon. He was at one time a proponent of all this “global warming/climate change” garbage...but he changed his views and was strongly against the notion that man can change the climate.
Crichton wrote a great novel called “State of Fear”, in which a team of researchers try to stop a conspiracy by environ-MENTAL-ists to create disasters in order to hype climate change.
Good talk by Crichton:
https://www.youtube.com/watch?v=qOu8akBowTg