No country met WHO air quality standards in 2021 - data
Published: Mar 22, 2022 9:07 AM
Not a single country managed to meet the World Health Organization's (WHO) air quality standard in 2021, a survey of pollution data in 6,475 cities showed on Tuesday, and smog even rebounded in some regions after a Covid-related dip.
The WHO recommends that average annual readings of small and hazardous airborne particles known as PM2.5 should be no more...
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