(a) Smog is a mixture of smoke and fog. This is the most common example of air pollution that occurs in many cities throughout the world.
There are two types of smog:
(1) Classical smog
(2) Photochemical smog
(b) Adverse effects of photochemical smog:
• Eye irritants
• Nose irritation
• Headache
• Chest pain
• Dryness of throat
• Cough
• Difficulty in breathing
(c) (1) Use catalytic converters in automobiles.
(2) Plant certain plants (e.g. Pinus) which can metabolise nitrogen oxide.
