What is smog? How is classical smog different from photochemical smog?
(N/A) Smog is a form of air pollution resulting from the combination of smoke and fog. There are two primary types of smog:
$a)$ Classical smog
$b)$ Photochemical smog
The differences between the two are summarized in the table below:
$a)$ Classical smog
$b)$ Photochemical smog
The differences between the two are summarized in the table below:
| Feature | Classical smog vs. Photochemical smog |
| Occurrence | Classical smog: Occurs in cool,humid climates. Photochemical smog: Occurs in dry,sunny climates. |
| Components | Classical smog: Smoke,fog,and $SO_2$. Photochemical smog: $PAN$,acrolein,$O_3$,formaldehyde,and $NO$. |
| Nature | Classical smog: Reducing in nature. Photochemical smog: Oxidizing in nature. |
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