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Q. Which of the following natural formations is often referred to as the "lungs of the planet"?
Answer: Tropical Rainforests
Notes: The term "lungs of the planet" is often associated with the Tropical Rainforests, specifically the Amazon Rainforest. This is because it produces more than 20% of the world's oxygen through photosynthesis. Furthermore, it serves as a massive carbon sink, absorbing large quantities of carbon dioxide, which helps regulate global climate.

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