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Asked Jan 5, 2020
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 Explain why either greatly decreasing or increasing the percentage of oxygen in the atmosphere is dangerous. 

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Oxygen is a chemical compound that exists in gaseous state under normal conditions. This gas is extremely important due to the dependence of living organisms on it. Oxygen occupies around 21% of Earth's atmosphere.

Oxygen is the controlling factor for the survival of life on Earth as almost all living beings inhale oxygen to regulat...

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