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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
Detailed Solution
Particulate matter is one of the major air pollutants released from thermal power plants, smelters, industries and vehicles.
According to the Central Pollution Control Board (CPCB), particulate size 2.5 micrometers or less in diameter (PM 2.5) is responsible for causing the greatest harm to human health.
These fine particulates can be inhaled deep into the lungs, as they are not filtered out by the nose and upper respiratory tract.
They can cause breathing and respiratory symptoms, irritation, inflammation and damage to the lungs, and premature deaths.
Larger particles are trapped in the upper respiratory passages and are removed more easily.
So the particulate size responsible for the greatest harm is 2.5 micrometers or less.
According to the Central Pollution Control Board (CPCB), particulate size 2.5 micrometers or less in diameter (PM 2.5) is responsible for causing the greatest harm to human health.
These fine particulates can be inhaled deep into the lungs, as they are not filtered out by the nose and upper respiratory tract.
They can cause breathing and respiratory symptoms, irritation, inflammation and damage to the lungs, and premature deaths.
Larger particles are trapped in the upper respiratory passages and are removed more easily.
So the particulate size responsible for the greatest harm is 2.5 micrometers or less.