The average amount of CO2 in atmosphere is:
Correct answer: D. 0.03%
- A. 0.30%
- B. 0.00%
- C. 3.00%
- D. 0.03%
Explanation
Traditional forestry and ecology texts commonly state atmospheric carbon dioxide as about 0.03%, although modern measurements are closer to 0.04%. Among the given choices, 0.03% is the accepted textbook answer.
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