WHO(세계보건기구) 대기환경기준 권고(안)입니다. 말그대로 권고안이지만 현재 우리나라의 대기질 국가환경기준보다 강화된 기준입니다. WHO 대기질 권고기준 Particulate Matter (PM)Fine Particulate Matter (PM2.5)10 μg/m3 annual mean25 μg/m3 24-hour mean Coarse Particulate Matter (PM10)20 μg/m3 annual mean50 μg/m3 24-hour mean Ozone (O3) 100 μg/m3 8-hour mean Nitrogen dioxide (NO2)40 μg/m3 annual mean200 μg/m3 1-hour mean Sulfur dioxide (SO2)20 μg/m3 24-hour mean500..