PM2.5 Explained: What is Fine Particulate Matter and Why It Matters

Fine particulate matter (PM2.5) refers to tiny particles or droplets in the air that are 2.5 micrometers in diameter or smaller. These particles are so small that they can be inhaled deep into the lungs and even enter the bloodstream. Fine particulate matter can come from various sources such as industrial emissions, vehicle exhaust, wildfires, and burning of fossil fuels. Exposure to PM2.5 can have adverse health effects, especially for people with respiratory or cardiovascular conditions, and it is also known to contribute to air pollution and reduce visibility.