The maximum amount of CO2 fixed by green plants by way of photosynthesis in a year is:
Correct answer: A. 9 x 10^13 kg
- A. 9 x 10^13 kg
- B. 8 x 10^12 kg
- C. 9 x 10^11 kg
- D. 8 x 10^10 kg
Explanation
Global photosynthesis fixes roughly 9 × 10^13 kg of carbon dioxide annually, although the exact estimate varies with the method and period used. The other values are too small for worldwide plant production.
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