According to current NAAQS standards,particulates
A)less than 2.5 micrometers in diameter have the greatest impact on human health.
B)greater than 10 micrometers in diameter have the greatest impact on human health.
C)should not be regulated by the EPA based on size.
D)all regardless of size when released into the air drops out within 15 minutes and thus is quite safe.

Question

Quizplus · Accepted Answer

Particulates less than 2.5 micrometers in diameter (PM2.5) are considered more harmful to human health as they can penetrate deep into the lungs and even enter the bloodstream, causing respiratory and cardiovascular problems. The EPA has set stricter standards for PM2.5 levels in the air compared to larger particulates.

According to Current NAAQS Standards,particulates