Environment & Ecology · Environmental Science
Consider the following statements regarding primary and secondary air pollutants: A. Secondary pollutants are always more toxic than primary pollutants B. Ozone in the troposphere is a secondary pollutant C. PAN is formed via photochemical reactions involving NOx and hydrocarbons D. CO2 is considered a criteria air pollutant Which of the above are correct?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1A and D only
- 2B, C and D
- 3A, B and C
- 4B and C only✓
Correct answer
B and C only
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