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    Question

    According to the WMO, what concentration of CO ₂ was

    recorded in 2023, representing 151% of pre-industrial levels?
    A 380 ppm Correct Answer Incorrect Answer
    B 400 ppm Correct Answer Incorrect Answer
    C 420 ppm Correct Answer Incorrect Answer
    D 440 ppm Correct Answer Incorrect Answer
    E 460 ppm Correct Answer Incorrect Answer

    Solution

    The World Meteorological Organization reported a CO ₂ concentration of 420 ppm in 2023, marking an increase driven by fossil fuel emissions and other factors.

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