Question

Which is not correct about harmful effect of SPM of $2.5\mu$m or less.

• A. It can directly enter our circulatory system
• B. It can cause inflammation and damage to the lungs
• C. It can be inhaled into lungs
• D. It can cause respiratory problems

Answer 1

The correct option is A It can directly enter our circulatory system

According to the Central Pollution Control Board (CPCB), particulate size 2.5 micrometres or less in diameter (PM2.5) are responsible for causing the greatest harm to human health. These fine particles can be inhaled deep into lungs and can cause breathing and respiratory symptoms, irritation and inflammation, damage to lungs and premature deaths.

So, the correct answer is 'It can directly enter our circulatory system'.