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Question
Forests are also known as the green _______ of the Earth.
Options:
A .  eyes
B .  lungs
C .  heart
D .  kidney
Answer: Option B
:
B
Forestsabsorb the carbon dioxide released by animals from the atmosphere and produce oxygen for respiration. In this manner they maintain the balance of these gases in the atmosphere. Hence, they are known as the green lungs of the Earth.

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