Air Quality Norms by WHO Current Affairs, GK & News

WHO revises Air Quality norms

The World Health Organisation (WHO) has revised its global air quality guidelines and recommended more stringent standards for key pollutants. Key facts WHO set the new standards in the first update of its air quality guidelines since 2005. PM 2.5 norms for 24 hours average has been changed to 15 micro-g/m3 against 25 micro-g/m3 in ..