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

2011

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
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 only

(b)

2 only

(c)

2 and 3 only

(d)

3 only

Answer:

(b)

Core Books/NCERT

Explanation

Option (b) is correct: Phytoplankton in the oceans plays a major role in absorbing atmospheric CO2 through photosynthesis. The other statements are not correct in this context.