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where does the oxygen come from


4703 day(s) ago

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Gnome 		the oxygen is formed with other gases like nitrogen etc, and is produced by trees.

Posted 4635 day ago

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Loz 		When Earth was first created, the atmosphere was made of what came out of volcanos.. this was mainly Carbon Dioxide. Later oceans were formed.. and bacteria developed that could photosynthesise, these later turned into a mass of plants that give us the oxygen we have today.

Posted 4684 day ago

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