First slide

Air Pollution and its Control

Question

Air pollutants that produce photochemical smog include

Easy

A

CO₂, CO, SO₂
B

nitrous oxide and fluorocarbons
C

ozone, PAN and nitrogen oxides
D

O₂, Cl, SO₂

Solution

Photochemical smog is a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds (VOCs) react to sunlight, creating a brown haze above cities. It tends to occur more often in summer, because that is when we have the most sunlight.

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