Stofpartikler

Stofpartikler, often referred to as particulate matter (PM), are tiny solid or liquid droplets suspended in the air. They are a complex mixture of various substances, including soot, dust, smoke, and aerosols. Their size varies significantly, but they are generally categorized based on their aerodynamic diameter. PM2.5 refers to particles with a diameter of 2.5 micrometers or less, while PM10 includes particles up to 10 micrometers. For comparison, a human hair is typically about 50 to 70 micrometers wide.

These particles can originate from both natural and anthropogenic sources. Natural sources include volcanic eruptions, dust storms, wildfires, and sea spray. Human-made sources are more diverse and often dominant in urban and industrial areas. These include the combustion of fossil fuels in vehicles, power plants, and industrial processes, as well as activities like construction, agriculture, and residential heating.

The presence of stofpartikler in the atmosphere has significant implications for human health and the environment. Due to their small size, PM2.5 particles can penetrate deep into the lungs and even enter the bloodstream, leading to respiratory and cardiovascular problems. They can also contribute to haze, reduce visibility, and play a role in climate change by scattering and absorbing solar radiation. Environmental impacts include damage to ecosystems and materials. Consequently, monitoring and controllingstofpartikler emissions are important public health and environmental policy objectives worldwide.