For the past 500 million years (with animals) the climate has fluctuated massively both hotter and colder. The earth is currently in an very normal climate flu

For the past 500 million years (with animals) the climate has fluctuated massively both hotter and colder. The earth is currently in an very normal climate fluctuation. We're almost right at the mean of the past 500 million years. Humans aren't impacting the environment even close to as much as natural climate fluctuations.