Particulate matter pollution generally consists of a mixture of very small particles of dust, pollen, ash, soot, metals and other various solid and liquid chemicals found in the atmosphere.

atter What is particulate matter? Particulate matter (PM) is a mixture of microscopic solids and. liquid droplets suspended in air. This pollution is made up of a number of components, …

What is Particle Air Pollution? Why Is it Important to Communicate Information about Particle Pollution to the Public?

Airborne particles, the main ingredient of haze, smoke, and airborne dust, present serious air quality problems in many areas of the United States. This particle pollu tion can occur year …

When scientists make measurements of aerosols, they can measure, for a typical cubic centimeter of air, the number of particles that fall within a small range of diameters. This …

Particulate matter (PM) is the generic term for a broad class of chemically and physically diverse solid particles and liquid droplets found in the ambient air (Figure 1).

Chemicals and Materials How Do Particulates Enter the Respiratory System? On this page What are particulates? What are the parts of the respiratory system that can be affected? How are …