India to recalibrate air quality standards next year{br} https://ift.tt/eA8V8J

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.

from Times of India https://ift.tt/3spsBBv