"If rainforests and tropical forests are the lungs of the Earth, then surely wetlands function as its kidneys." Which one of the following functions of wetlands best reflects the above statement?
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A medium Environment multiple-choice question from UPSC Prelims 2022. Attempt it above, then check the correct answer and detailed explanation below.
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Correct answer: D. Aquatic plants absorb heavy metals and excess nutrients.
Like kidneys filtering blood, wetlands filter water — aquatic plants absorb heavy metals and excess nutrients, purifying the water. Option (d).
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