Physical Environment
> Atmosphere
Loading
Basic Information
Further Information
Other Hotu Pages
This site tells the story of the history of the universe. Click
Earlier
and
Later
to follow the story.
Note:
Many facts have been simplified to make them easier to understand.
Click here to read Time Crystal, history of the Universe as sci-fi fantasy romance!
The
Earth
's atmosphere today contains the following
gases
(among others)
Gas
% by Volume
nitrogen
78
oxygen
21
argon
0.9
carbon dioxide
0.03
The
oxygen
in today's atmosphere has all been released by
plants
.
Useful Links
Buy links to your science site
Reach 800k annual visitors. Buy short or long links from this PR5, Alexa Rank 154k site. Relevant links only please.
by Wyken Seagrave
  |   Copyright © 2012 Penny Press Ltd   |     
Terms and Conditions of Use and Sales