Feinstaub refers to tiny particles in the air that are smaller than 10 micrometers in diameter. These particles can come from various sources, including vehicle emissions, industrial processes, and natural events like wildfires. Due to their small size, they can easily enter the lungs and even the bloodstream, posing health risks to humans. Exposure to Feinstaub is linked to respiratory and cardiovascular diseases, as well as other health issues. Governments and organizations monitor air quality to manage Feinstaub levels, implementing regulations to reduce emissions and protect public health.