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Q.

Why are forests also called "The green lungs" of our planet?

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a

They excrete carbon dioxide as a byproduct.

b

They give out water vapour and make the air moist.

c

They take in oxygen and give out carbon dioxide.

d

They release oxygen during photosynthesis.

answer is C.

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Detailed Solution

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The forests are also called "The green lungs" because they release oxygen during photosynthesis, i.e., they act as air purifiers. Oxygen is required by animals as well as human beings for cellular respiration. Green plants maintain the balance of oxygen in the atmosphere.

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