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:

Environment Studies (Science) (M.Phil./Ph.D.) 2018 Panjab University Entrance Exam With Answers

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40.

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 phyto-plankton 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

The answer is: C

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