Question

what is the third atmosphere​

Answer 1

mesosphere

Explanation:

Now we have Earth's “third atmosphere,” the one we all know and love—an atmosphere containing enough oxygen for animals, including ourselves, to evolve. So plants and some bacteria use carbon dioxide and give off oxygen, and animals use oxygen and give off carbon-dioxide—how convenient

Answer 2

Answer:

Now we have earth third atmosphere , the one we all know and love - an atmosphere containing enough oxygen for animals, including ourselves, to evolve .