Multiple choice

Which of the following are the immediate concerns regarding carbon cycle?

a. Output rate of carbon locked in deposits of coal, petroleum and natural gas. b. Green house effect is caused by CO2. c. Increase in CO2 on Earth’s atmosphere by 12 to 14%. d. Increase in CO2 decreases primary productivity. e. Increase in photorespiration.

  1. a, b and c

  2. b, c and d

  3. c, d and e

  4. a, d and e
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

All these are the immediate concerns regarding carbon cycle.

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