Fine dust

Fine dust is a complex, airborne mixture of solid and liquid particles which are classified into different fractions depending on their size: there are PM10 (PM = particulate matter) with a maximum diameter of 10 micrometres (µm), PM2.5 and ultra-fine particles with a diameter of less than 0.1 µm. PM10 can enter a person's nasal cavity, PM2.5 can get into the bronchial tubes and pulmonary alveoli, and ultra-fine particles can penetrate lung tissue and even get into the bloodstream. To protect our health, European limits on fine dust pollution have therefore been in effect since 1 January 2005.