What is smog? How is classical smog different from photochemical smog?
What is smog? How is classical smog different from photochemical smog?
Smog is a kind of air pollution. It is the blend of smoke and fog. There are two kinds of smog :
$a)$ Classical smog
$b)$ Photochemical smog
The two smogs can be differentiated as follows:
| Classical smog | Photochemical smog | |
| Occurrence | It occurs in a cool, humid climate. | It occurs in a dry, sunny climate. |
| Components | Smoke, fog and ulphurdioxide. | $PAN$, acrolein, ozone, formaldehyde, nitric oxide. |
| Nature | It is reducing in nature | It is oxidizing in nature. |
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