particulate matter

A mixture of solid particles and liquid droplets (dust, dirt, soot, or smoke) (US Environmental Protection Agency, 2018b).

A mixture of solid particles (dust, dirt, soot, or smoke) and liquid droplets.

Particulate matter (PM), also known as atmospheric particulate matter, or suspended particulate matter (SPM) are microscopic solid or liquid matter suspended in Earth's atmosphere. Sources of particulate matter can be natural or anthropogenic. They have impacts on climate and precipitation that adversely affect human health.

A mixture of solid particles and liquid droplets (dust, dirt, soot, or smoke).