Question:medium

Photochemical smog formation in urban areas is mainly due to the presence in the atmosphere of.

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To distinguish between smog types:
- Photochemical Smog (Los Angeles type) = Oxidizing, requires warm sunlight, characterized by $\text{NO}_x$, $\text{O}_3$, and PAN.
- Industrial Smog (London type) = Reducing, occurs in cool damp climates, characterized by $\text{SO}_2$ and soot.
Updated On: Jul 23, 2026
  • Ozone, PAN, and Nitrogen dioxide.
  • Fog and Smoke.
  • Particulates and fog.
  • Winter climate and high humidity
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The Correct Option is A

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