It's cognitive dissidents. We all know this is happening to every aspect of our enviornment and that we as humans are behind it. But of course we're not going to give up our material world, and we'll continue to disbelieve only because it threatens our very nature of the animal that minipulates materials. The planet isn't doomed, we are. We're creating conditions that are feeding back on us in a negitive way. We will be our own distruction; probably be creating a nice warm enviornment for some disease to mutate and run rampant, where the only humans left will be some isolated populations of humans. To Moburg in Hunter S. Thompson's "Rum Diaries, "The only animals to claim a god, yet behave the least lile they have one."
Fairly morose even for internet standards. The Earth is plenty capable of plunging into an ice age without human intervention. Also no matter what an asteroid is eventually going to destroy the earth or it will get swallowed up by some exploding star.
Those facts still should paralyze you. We are all plenty capable of improving the lives of ourselves and others today. What’s stopping you?
None of those things are relevant for you and your children and grandchildren. But global climate change and ecological collapse almost certainly will be.