Question

What is the 'earth's atmosphere' made up of?

Answer 1

`78%` Nitrogen | `21%` Oxygen | `0.9%` Argon | `0.04%` `"CO"_2` | `0.06%` Other Gases

Explanation:

The main gases in our atmosphere are nitrogen & oxygen.

About four-fifths (`80%`) of the atmosphere is nitrogen & one-fifth (`20%`) is oxygen.

The Evolution of Plants removed much of the early Earth's atmosphere's `"CO"_2`, not to mention the introduction of more oxygen removed other harmful gases such as ammonia & methane by reacting with it.

`CH_4 + 2O_ 2 rarr CO_2 + 2H_2O`

`4NH_3 + 3O_2 rarr 2N_2 + 6H_2O`

This made more `"CO"_2` available for plants, created more water to support animal life & got rid of poisonous gases which killed off animal life, without plants, we wouldn't be here.

Give a tree a hug.

Hopefully this helps you.