(ANSA) - BELGRADE, JUN 7 - Bulgaria is the EU country with the highest annual mean concentration of fine particles (PM2.5) in its urban areas, according to data recently released by Eurostat. The concentration registered in Bulgaria in 2019 was 19.6 μg/m3. Bulgaria was followed by Poland (19.3 μg/m3), Romania (16.4 μg/m3) and Croatia (16.0 μg/m3). In contrast, the concentration is lowest in urban areas of Estonia (4.8 μg/m3), Finland (5.1 μg/m3) and Sweden (5.8 μg/m3), Eurostat said. At EU level, the annual mean concentration of fine particles in urban areas has been gradually decreasing in the past years, reaching 12.6 μg/m3 in 2019. (ANSA).