7th Class Science Forests: Our Lifeline Question Bank Resources on Earth - Forests and Ecosystem

  • question_answer
    Which of the following are called green lungs?

    A)  Mountains                        

    B)  Oceans               

    C)         Forests               

    D)         Rivers

    Correct Answer: C

    Solution :

    Forests are called green lungs. Forests take in carbon dioxide and give out oxygen and maintains a balance of these gases in the atmosphere.


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