Particulate matter, often abbreviated as PM, refers to tiny particles or droplets in the air that can be harmful to health. These particles can come from various sources, including vehicle emissions, industrial processes, and natural events like wildfires. They vary in size, with some being so small that they can penetrate deep into the lungs and even enter the bloodstream, potentially causing respiratory and cardiovascular issues. There are different types of particulate matter, categorized by their size, such as PM2.5 and PM10. PM2.5 particles are particularly concerning because they are less than 2.5 micrometers in diameter, making them easy to inhale. Reducing exposure to particulate matter is essential for improving air quality and protecting public health.