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  4. According to Central Pollution Control Board (CPCB), particulate size micrometers or less in diameter are hazardous to human health.

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Q. According to Central Pollution Control Board (CPCB), particulate size _____ micrometers or less in diameter are hazardous to human health.

NTA AbhyasNTA Abhyas 2022

Solution:

According to Central Pollution Control Board (CPCB), particulate size 2.5 micrometers or less in diameter (PM 2.5) are responsible for causing the greatest harm to human health. These fine particulates can be inhaled deep into the lungs and can cause breathing and respiratory symptoms, irritation, inflammations and damage to the lungs and premature deaths.