India to recalibrate air quality standards next year

India is likely to have new national ambient air quality standards (NAAQS) in 2022, factoring in more pollutants, including ultra-fine particulate matter of less than PM2.5. The existing national standard was formulated 12 years ago.

source https://timesofindia.indiatimes.com/india/india-to-recalibrate-air-quality-standards-next-year/articleshow/85386307.cms