Overview
The gaseous composition of unpolluted air
|
The Gases
|
Parts Per Million (vol.)
|
|
Nitrogen
|
756,500
|
|
Oxygen
|
202,900
|
|
Water
|
31,200
|
|
Argon
|
9,000
|
|
Carbon Dioxide
|
305
|
|
Neon
|
17.4
|
|
Helium
|
5.0
|
|
Methane
|
0.97-1.16
|
|
Krypton
|
0.97
|
|
Nitrous oxide
|
0.49
|
|
Hydrogen
|
0.49
|
|
Xenon
|
0.08
|
|
Organic vapors
|
ca.0.02
|
Source: http://edugreen.teri.res.in