History of the Universe

History of the Universe eBook. 398 pages, 300 illustrations only $2.99

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Atmosphere

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.

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History of the Universe eBook
History of the Universe eBook
Only $2.99

Written by Wyken Seagrave
Copyright © 2017 Penny Press Ltd