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10 November, 13:44

Explain two reasons why having an oxygen-rich atmosphere is important for pife on Earth?

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  1. 10 November, 13:53
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    Humans need oxygen to breathe.

    Majority of animals that humans depend on for food need oxygen to breathe.
  2. 10 November, 14:02
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    First, oxygen makes up the ozone layer, blocking harmful radiation from the sun, and all living things need oxygen to survive!
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