Question

Air pollution does not occur

• A. In slum areas
• B. Adjacent to bus stations
• C. In areas of clean air
• D. In industrial areas

Hint:

Air pollution is common in urban and industrial areas but rare in naturally preserved clean-air environments such as forests and high mountains.

Answer 1

The Correct Option is C

Step 1: Understanding air pollution.
Air pollution occurs when harmful substances such as smoke, dust, gases (SO$_2$, NO$_2$, CO), and industrial emissions contaminate the atmosphere.

Step 2: Checking each option.
- (a) In slum areas → Generally overcrowded and polluted due to poor sanitation and use of biomass fuels. Air pollution is present.
- (b) Adjacent to bus stations → Vehicle exhaust produces smoke and harmful gases like CO and NO$_x$, contributing to air pollution.
- (c) In areas of clean air → By definition, these are pollution-free regions, such as rural forests, mountains, or areas far from human activities. Hence, no air pollution occurs here.
- (d) In industrial areas → Industries emit smoke, chemicals, and particulate matter, which cause air pollution.
\[ \boxed{\text{Thus, air pollution does not occur in areas of clean air.}} \]