Particulate Matter

Definition

Particulate matter refers to tiny solid or liquid particles suspended in the air. These particles can vary in size and composition, and they can come from natural sources like dust or human activities such as burning fossil fuels.

Related terms

Air Pollution: Particulate matter is one of the components of air pollution, along with gases like nitrogen dioxide and ozone.

PM2.5: PM2.5 refers to fine particulate matter with a diameter of 2.5 micrometers or smaller. These tiny particles are particularly concerning because they can penetrate deep into the lungs and enter the bloodstream.

Respiratory Diseases: Exposure to high levels of particulate matter has been linked to an increased risk of respiratory diseases such as asthma, bronchitis, and lung cancer.