September 23, 2021 10:24 am
While a PM2.5 concentration of 25 micrograms per cubic metre in a 24-hour period was considered safe earlier, the WHO has now said that a concentration of over 15 micrograms is not safe.
April 07, 2015 5:30 pm
PM launches national air quality index; Javadekar assures new construction norms in 15 days.
April 07, 2015 8:17 am
Launch of a national air quality index is a good first step. Better data alone is not enough.