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Oxygen

30 bytes added, 16:35, 30 May 2007
category/template, and word origin
Many [[animal]]s depend upon oxygen as a highly efficient ingredient for breaking down [[food]] for [[energy]], due to its reactivity. Those that do not are called "[[anaerobic]]", meaning "without air", and include many important [[bacteria]].
 
==References==
<references/>
[[Category: hydrogen economy]]
[[Category:gases]]
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