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    Question

    PM2.5 in air pollution refers

    to:
    A Sulphur dioxide Correct Answer Incorrect Answer
    B Carbon monoxide Correct Answer Incorrect Answer
    C Ozone particles Correct Answer Incorrect Answer
    D Particulate matter with diameter ≤ 2.5 micrometers Correct Answer Incorrect Answer
    E Lead particles Correct Answer Incorrect Answer

    Solution

    PM2.5 are fine inhalable particles that penetrate deep into the lungs, causing major health hazards.

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