According to the Central Pollution Control Board, particles that are responsible for causing great harm to human health are of diameter

Options

A. 2.50 micrometers
B. 5.00 micrometers
C. 10.00 micrometers
D. 7.5 micrometers

Explanation

Particulate air pollutant like soot, flyash, dust of various types, pollens, spores, fur hair,ect., can be differentiated as setteable `(10mu " m or more")` and suspended ,` ("less than" 10mu m)` Particulate matter pollutant. Their effect (on the environment) depends on the size of particles . According to CPCB, particulate matter of 2.5mu m or less in diameter are responsible for causing great garm to human health. The particular matter of 2.5 or less in size are inhaled deep into the respiratory tract (upto lungs) and causes respiratory problems and may even lead to death.