My money is on WWIII.Simple people want simple answers. Poverty causes crime, whites are racists, government steals money, the President is a criminal (take your pick there of which one), the MIC runs everything, Communism and Socialism work, yadda-yadda-yadda. I see all of those and more as largely children who see everything in only black and white.
So of course many flock to "CO2 is bad and will kill the planet". Simple answer. Of course, none can really come up with a solution. Such as how we are going to support a population of almost 8 billion people without the output of CO2 and other gasses.
Of course, most would also be horrified to learn that I believe the only way to reduce that to a negligible number is to reduce the human population back to 19th century levels. No more than around a billion people.
See why I laugh whenever people call me a "denier"? That is actually my belief. And eventually it likely will happen. We dodged the bullet with COVID, but eventually a much more lethal virus will break out, and likely cut the population of the planet in half. With no other predators, disease is the most likely way the planet will cull our numbers.
So I guess I am a denier that things are only going to get a hell of a lot worse, and it will require the deaths of 7/8 of the population to return CO2 to a manageable number. Of course, that culling will also have the effect of the survivors moving to better farmland, and the deforestation of the rainforests will end. And likely within two generations will be approaching their largest size since pre-history.