How does global warming affect extinction?

Answer 1

Global warming changes natural habitats making them unliveable for many species

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Global warming was the first effect identified that was shown to lead to species extinction events. For instance, a mountain frog would migrate from lower to higher elevations annually to survive. The species is now extinct because of global climate instability. The frog reached the top of the mountain and it was still too warm and their species died, all of them; extinct.

There is a difference between Mass Extinction and Global Extinction.

Mass Extinction is where a large percentage of a species dies.

-- This is like a plague that wipes out 90% of a species

Global Extinction is where the entire population of a species becomes extinct.

-- This is like the mountain frog, it is completely extinct

-- Melting of the Methane Permafrost could release enough methane to

kill all humans

Total Extinction is where all species globally become extinct; including ourselves.

-- A large asteroid, black hole on a trajectory with our solar system, a

near region super-nova, super-volcano eruption, abnormally large

Solar Mass Ejection, ...