composition+of+the+atmosphere+martian

Eaths atmosphere is fairly uniform up to an altitude of about 80 kilometers. The atmosphere is made of gases called nitrogen, oxygen, water vapor, and many other gases in which tiny solid and liqued particles are suspended. Nitrogen and oxygen make up 99% of clean air. .002% in cold dry air and 4% in warm, moist air. Some solid particles can be seen as floating dust. This dust comes from many things such as ash, salt from ceanic spray.