[Steven Tyler]

I wish the Consensous science pinheads would give us all the facts about our atmosphere:
Nitrogen, 780,900 parts per million
Oxygen, 200,950 parts per million
Argon, 9,500 parts per million
CO2, 400 parts per million

[Olog-hai]

Don’t forget about water vapor, which on “average” is at 4,000 ppm but can go as high as 40,000 ppm at the equator.