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What is the approximate concentration of CO2 in the atmosphere?
A0.3 to 0.4 per cent
B3 to 4 per cent
C0.03 to 0.04 per cent
D0.003 per cent
Answer & Solution
Correct answer: C. 0.03 to 0.04 per cent
Atmospheric CO2 is only 0.03 to 0.04 per cent, which makes it a major limiting factor.
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