Envis Centre, Ministry of Environment & Forest, Govt. of India

Printed Date: Wednesday, October 16, 2024

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