Question

What elements make up the earth's atmosphere?

Answer 1

Nitrogen gas, oxygen gas, argon, carbondioxide, etc.

Explanation:

Composition of clean dry air is

Nitrogen (`N_2`) 78.08%; oxygen (`O_2`) 20.95%; argon (Ar) 0.93%; carbondioxide (`CO_2`) 0.04%; neon (Ne) 0.0018%; helium (He) 0.0005%), etc.

Carbondioxide has been rising at a notable rate due to ever increasing greenhouse gas emissions and decreasing photosynthetic plants, natural areas, etc.