Question:medium

Which of the following is a criteria pollutant as per National Ambient Air Quality Standards?

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Criteria pollutants include CO, NOx, SO2, particulate matter, and others regulated for public health.
Updated On: Feb 20, 2026
  • $CO_2$
  • $NH_3$
  • $CFCs$
  • CO
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The Correct Option is D

Solution and Explanation

  1. Carbon monoxide (CO) is a toxic criteria pollutant, capable of causing severe health effects by hindering oxygen transport in the blood.
  2. CO2 and CFCs, unlike CO, are not classified as criteria pollutants under NAAQS.
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