Methane hydrate deposits climate impact
Question
Which of the following statements are correct about the deposits of 'methane hydrate'?
Select the correct answer using the code given below.
- 1.
Global warming might trigger the release of methane gas from these deposits.
- 2.
Large deposits of 'methane hydrate' are found in Arctic Tundra and under the seafloor.
- 3.
Methane in atmosphere oxidizes to carbon dioxide after a decade or two.
Options
1 and 2 only
2 and 3 only
1 and 3 only
1, 2 and 3
Explanation
Statement 1 is correct: Rising temperatures can destabilize methane hydrate deposits, causing methane release, which is a positive feedback loop in climate change. Statement 2 is correct: Methane hydrates are found extensively in Arctic permafrost regions and on seafloors worldwide, representing a vast potential source of methane. Statement 3 is correct: Atmospheric methane has a relatively short lifetime (approximately 10-12 years) after which it oxidizes to CO2 and water vapor. All three statements accurately describe aspects of methane hydrate deposits and their climate significance. > Methane hydrate: climate risk, widespread deposits, atmospheric oxidation confirmed. Answer: (d).
Question details
Year
2019
Paper
GS Paper 1
Question
Q34
Subject
Environment
Sub-topic
Climate change and greenhouse gases
Type
Statement-based
Difficulty
Medium
Nature
Static
Source hint
NCERT Environmental Science
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