Korea had the worst air pollution in the OECD last year, according an annual report by air quality monitoring firm IQAir AirVisual on Tuesday.
Korea had an average ultrafine dust or PM2.5 concentration of 24.8 ㎍/㎥, overtaking Chile with 22.6 ㎍/㎥ from a year earlier.
The pollution level given by AirVisual is slightly higher than the 23 ㎍/㎥ measured by the National Institute of Environmental Research. AirVisual noted that its report “is based on data…
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from : english.chosun.com