Question

What does Particulate Matter (PM) refer to?

• A. Gaseous pollutants in the atmosphere
• B. Inhalable particles composed of various substances
• C. Ozone layer depletion substances
• D. Greenhouse gases contributing to global warming

Answer 1

Answer:

B. Inhalable particles composed of various substances

• Particulate matter (PM) refers to inhalable particles, composed of sulphate, nitrates, ammonia, sodium chloride, black carbon, mineral dust or water.

• PM can be of different size and is generally defined by their aerodynamic diameter, with PM_2.5, and PM_10, the most common in the regulatory framework and relevant for health.