Which of the following is not a primary pollutant of the troposphere?
Correct answer: A. Carbon dioxide
- A. Carbon dioxide
- B. Sulfur dioxide
- C. Carbon monoxide
- D. Ammonia
Explanation
Carbon dioxide is not considered a primary pollutant of the troposphere because it is a natural component of the atmosphere and is essential for photosynthesis and plant growth. Primary pollutants are directly emitted into the atmosphere and can cause harm to human health and the environment. Sulfur dioxide, carbon monoxide, and ammonia are all examples of primary pollutants.
This question appeared on the NUMS 2019 (cancelled sitting) paper, which you can sit online with every answer explained.
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