How many countries met the World Health Organization’s air quality standards in 2021?

Not a single country met the World Health Organization’s (WHO) air quality standard in 2021. In a survey of pollution data in 6,475 cities published on March 22, 2022, only 3.4% of the surveyed cities met the bar in 2021. According to data compiled by IQAir, a Swiss pollution technology company that monitors air quality, as many as 93 cities saw 10 times the recommended level of polluters. New Delhi remained the world’s most polluted capital. Bangladesh was the most polluted country.