How many times will they shout wolf?

Sounds like an apocalyptic cult master who keeps moving the goalposts. https://www.americanthinker.com/blog/2014/08/120_years_of_climate_scares.html

120 years of climate scares

“Global cooling is going to kill us all!” “No, wait: global warming is going to kill us all!” An amazing chronology of panic mongering.

I'm quite positive the human species has had an affect on the Earth. I am quite sure the effects are not (by a long shot) good for the environment as far as habitability goes. I am also quite sure we should be spending the money on adaptation and not prevention.