Question

What is air pollution?

• A. The presence of beneficial substances in the air.
• B. The contamination of air with harmful substances.
• C. The natural process of air circulation.
• D. An increase in oxygen levels in the atmosphere.

Answer 1

Answer:

B. The contamination of air with harmful substances.

• Air pollution is the contamination of air with harmful substances.

• The Air Pollution Control Act came into force in India in 1981.

• Vehicles, industrial establishments, etc., are the main causes of air pollution.