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 oce Exp. |
3. the trapping of air in the polar ice caps. |
Which of the statement(s) given above is/are correct? |
A) 1 and 2
B) Only 2
C) 2 and 3
D) Only 3
Correct Answer: B
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