everyday science MCQ #4718

Which of the following gases does not pollute the air?

everyday science MCQ #4718

  1. Question 1

    Q1. Which of the following gases does not pollute the air?

    • A) Carbon dioxide
    • B) Carbon monoxide
    • C) Nitrogen dioxide
    • D) Sulfur dioxide

    Answer: Carbon dioxide

    Explanation: Carbon dioxide is a natural component of the atmosphere and is essential for photosynthesis; while it contributes to the greenhouse effect, it is not classified as a directly harmful air pollutant like CO, NO₂, or SO₂.