Material/Constituent elements of air
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Approximate composition of dry atmosphere by volume:
| Element | % vol |
|---|---|
| Nitrogen | 78.08 |
| Oxygen | 20.95 |
| Argon | 0.93 |
| Carbon | < 0.01 |
| Others | trace |
Not included in above dry atmosphere: | |
Water vapour  (variable) |
~1% |
Source: NASA
Carbon dioxide updated (to 1998) by IPCC TAR table 6.1 [1]. Figure for carbon extrapolated from this
Edited text from [2]
Element links in list point to Wikipedia article
