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    Combined Science GCSE

    Causes of oxygen and nitrogen increase

    What Causes of oxygen and nitrogen increase means in Combined Science GCSE, as defined for AQA.

    Definition of Causes of oxygen and nitrogen increase

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    Oxygen increased because photosynthesis by algae and plants released it, while nitrogen increased because it was released by volcanoes and being unreactive it accumulated.
    AQA · How carbon dioxide decreased (study guide)

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