Home Biology Ecosystem Previous Year Questions According to Central Pollution Control Board…
Biology Ecosystem Previous Year Questions Single Correct MCQ
Published on: August 13, 2026

According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health?

A
1.0 or less
B
5.2 – 2.5
C
2.5 or less
D
1.5 or less

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Text Solution

Verified by Experts
The correct answer is:
C

According to the CPCB, particulate matter with a diameter of 2.5 micrometers or less (PM 2.5) causes the most significant health damage

These fine particles are so small that they can be inhaled deep into the lungs and even enter the bloodstream directly

Once inside, they lead to severe respiratory problems, inflammation, and long-term cardiovascular damage

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