June Sees Most Ozone Alerts in Seoul in 26 Years
SEOUL, Oct. 14 (Korea Bizwire) — Ozone level alerts were issued on nine days in Seoul in June, the highest monthly tally since the warning system was first introduced in 1995, the city government said Wednesday. The average ozone concentration level also reached a record 0.044 parts per million (ppm), leading to an average 0.031 [...]