Last year, ultrafine dust ‘bad’ was the lowest ever on the 17th… No ‘very bad’
[미세먼지로 뿌연 서울 ] Last year, the number of days when the level of ultrafine dust (PM2.5) was ‘bad’ or higher was the lowest ever. According to data from the Ministry of Environment, last year, the level of ultrafine dust nationwide exceeded 36 μg (micrograms) per cubic meter, and the number of days with bad … Read more