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Climate Change · Botany

What is the main concern regarding the thawing of 'Permafrost' in the Arctic?

  1. It will lead to a significant decrease in global sea levels.
  2. It releases stored methane and $CO_2$, amplifying warming.
  3. It will sharply increase the Earth's surface albedo.
  4. It will halt the flow of the Gulf Stream in the Atlantic.
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Correct answer: It releases stored methane and $CO_2$, amplifying warming.

Permafrost contains vast amounts of ancient organic matter. As it thaws, microbes decompose this material, releasing methane and carbon dioxide, which further accelerates global warming.

Difficulty: Medium Question 9 of 20

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