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24 August, 20:15

Answer the following questions

1. What are two sources of carbon dioxide in air?

2. what are trace gases

3. what are 2 processes that use oxygen?

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Answers (1)
  1. 24 August, 21:09
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    1) Natural: Ocean release. Human: Deforestation.

    2) A trace gas is a gas which makes up less than 1% by volume of the Earth's atmosphere.

    3) Plants and Sunlight
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