you mention climate being a waste, but one of the only extinction events bigger than KT was the permian triassic, and that was caused by high atmospheric CO2. W

you mention climate being a waste, but one of the only extinction events bigger than KT was the permian triassic, and that was caused by high atmospheric CO2. We're already on track for a pretty bad time (if all current government climate commitments are met, we're still on track for 3.8 degrees of warming by 2100, which is already a mass extinction), I would put climate induced mass extinctions above asteroid induced ones, just because we are in one now, and it is guaranteed to get worse.