Seudónimo Seudónimo
  • 30-05-2017
  • Biology
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what is 99.9 percent of the air we breathe?

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Tallon
Tallon Tallon
  • 30-05-2017
oxygen i think
hope this helps
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MMMski
MMMski MMMski
  • 30-05-2017
I believe most of what we breathe is nitrogen and oxygen. There are small amounts of other gases as well, but the air we breathe is primarily made up of oxygen and nitrogen.
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