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      Question

      The concentration of CO2 in the soil atmosphere is

      …………………………………..
      A 0.03% Correct Answer Incorrect Answer
      B 0.3% Correct Answer Incorrect Answer
      C 3% Correct Answer Incorrect Answer
      D 3.3% Correct Answer Incorrect Answer

      Solution

      The concentration of CO2 in soil is 0.25-0.3%.

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