Question

Select the correct statement about particulate matter.

• A. $10\mu$m size creates severe lung damage.
• B. More than $2.5\mu$m gets trapped in lungs and causes problems.
• C. Less than $2.5\mu$m penetrates deep into lungs.
• D. None of the above.

Answer 1

The correct option is C Less than $2.5\mu$m penetrates deep into lungs.

Atmospheric aerosol particles – also known as atmospheric particulate matter, particulate matter (PM), particulates, or suspended particulate matter are microscopic solid or liquid matter suspended in the atmosphere of Earth. Sources of particulate matter can be natural or anthropogenic. They have impacts on climate and precipitation that adversely affect human health. EPA is most concerned with these small particles because of their effect on the lungs. Particles < 2.5 μm are respirable – can penetrate deep into the lungs, and are potentially more problematic for human health than PM10.

So the correct answer is ' Less than 2.5μm penetrates deep into lungs'.