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Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because of
1) Its escape into the outer stratosphere.
2) The photosynthesis by phytoplankton in the oceans
3) The trapping of air in the polar ice caps.
Which of the statements given above is/ are correct?
  • a)
    1 and 2
  • b)
    2 only
  • c)
    2 and 3
  • d)
    3 only
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Human activities in the recent past have caused the increased concentr...
Explanation:
The statement that is correct is option 'B', i.e., 2 only.

The increased concentration of carbon dioxide in the atmosphere is a result of human activities such as burning fossil fuels and deforestation. However, not all of this carbon dioxide remains in the lower atmosphere. The following points explain the correctness of the given options:

1) Its escape into the outer stratosphere: Carbon dioxide does not escape into the outer stratosphere as it is a heavy gas and is not buoyant enough to reach the outer atmosphere.

2) The photosynthesis by phytoplankton in the oceans: Phytoplankton in the oceans use carbon dioxide for photosynthesis, which helps to reduce the concentration of carbon dioxide in the atmosphere. This is the correct statement.

3) The trapping of air in the polar ice caps: The trapping of air in the polar ice caps is not related to the concentration of carbon dioxide in the atmosphere.

Therefore, option 'B', i.e., 2 only, is the correct answer.
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Community Answer
Human activities in the recent past have caused the increased concentr...
Explanation: Statement 1 is incorrect because carbon-di-oxide is found only upto 90 km from earth surface and does not extend to outer stratosphere.
  • Phyto planktons are the primary producers of marine ecosystem and they absorb great amount of co2 for their photosynthesis from the lower atmosphere hence co2 in lower atmosphere is readily absorbed by them decreasing their quantity and acting as lungs. Hence statement 2 is correct.
  • Trapping of air in polar ice caps contain large amount of co2 of historic emissions and not recent ones hence statement 3 is incorrect.
Educational Objective: To study about various methods of Carbon sequestration and role played by Phyto planktons in it.
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Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere becauseof1) Its escape into the outer stratosphere.2) The photosynthesis by phytoplankton in the oceans3) The trapping of air in the polar ice caps.Which of the statements given above is/ are correct?a)1 and 2b)2 onlyc)2 and 3d)3 onlyCorrect answer is option 'B'. Can you explain this answer?
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Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere becauseof1) Its escape into the outer stratosphere.2) The photosynthesis by phytoplankton in the oceans3) The trapping of air in the polar ice caps.Which of the statements given above is/ are correct?a)1 and 2b)2 onlyc)2 and 3d)3 onlyCorrect answer is option 'B'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere becauseof1) Its escape into the outer stratosphere.2) The photosynthesis by phytoplankton in the oceans3) The trapping of air in the polar ice caps.Which of the statements given above is/ are correct?a)1 and 2b)2 onlyc)2 and 3d)3 onlyCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere becauseof1) Its escape into the outer stratosphere.2) The photosynthesis by phytoplankton in the oceans3) The trapping of air in the polar ice caps.Which of the statements given above is/ are correct?a)1 and 2b)2 onlyc)2 and 3d)3 onlyCorrect answer is option 'B'. Can you explain this answer?.
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