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?

Question

YESPYQ · Accepted Answer

Correct answer: 2 only. For slowing down global warming, carbon sequestra- tion involves the capture and storage of CO2. It is captured from the air, industries or power stations and stored permanently underground. This promotes Long-term reserve of CO2 or forms of carbon to control temperatures. Carbon sequestration aids in lowering the amount of GHGs (due to combustion of fossil fuels) present in the air. Statement 2 is correct: The photosynthesis by phytoplankton in the oceans is natural carbon sequestration and it is responsible for much of CO2 being moved from lower atmosphere to oceans: Statements 1 is incorrect: CO₂ is a heavy gas that primarily ac- cumulates in the troposphere and lower stratosphere but does not escape into the outer stratosphere or space. The primary removal mechanisms of CO₂ involve absorption by oceans, pho- tosynthesis by plants, and geological sequestration rather than atmospheric escape. Statements 3 is incorrect: Polar ice caps and glaciers are not a major active carbon sink. Ice trapping does not remove a signif- icant amount of CO₂ from the atmospher

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