There is a difference between fine particulate matter and ultrafine particles: because ultrafine particles are so small, it behaves differently. The larger particulate matter (up to 10 micrometres) ...

But smaller particulate matter (called PM 2.5) is apparently even worse, since the fine particles can get into the deeper parts of your lungs and your blood.

Particulate matter, found in wildfire smoke, has “no effect” on human health and is “total junk science.” Science PunditFact Steve Milloy By Loreben Tuquero June 20, 2023 ...

The proportion of harmful substances in particulate matter is much higher than assumed Date: March 31, 2025 Source: University of Basel Summary: People breathing contaminated air over the course ...

Particulate matter (PM) is made up of tiny pieces of solid or liquid in the air including dust, dirt, soot and smoke, according to the Centers for Disease Control and Prevention.