[immibis]

We definitely won't be able to fix it fast enough. And the answer to "what happens?" is simply: Darwin.

There is already historical precedent for what happens when a species makes the planet uninhabitable for nearly everything: after the evolution of photosynthesis, the atmosphere filled up with extremely toxic waste product known as oxygen gas, driving most species to extinction. The ecology recovered, with new species, millions of years later.

Rich people won't survive in their bunkers, either.

[model-15-DAV]

I reject your argument entirely. Your nihilistic thinking is what continues the crisis. Reject the void, choose productivity, and work to make the world better.

[immibis]

You can if you want, but the rest of the world is still going to continue trying to drive you extinct anyway, so you'd rather have a plan for that, than not.