Climate change is analogous to a scenario we see all the time in nature i.e. a species finds massive success causing its population to spike, this population spike degrades the supporting environment and the species risks extinction.

We dodged this in the 20th century with the green revolution but the risk remains. We still haven’t figured out how to live within the limits of our environment, instead we continue to extract from it and degrade it. If we don’t figure this problem out then our species is done for.

Compared to this the other two are barely even risks.