Ultrafine dust chokes Korea, cold spell expected late Wednesday
Social affairsDec 10, 2019
South Korea was blanketed by a high level of particulate pollution Tuesday, prompting emergency dust reduction measures for the first time this winter and an ultrafine dust advisory issued in the afternoon. The implementation of emergency measures was extended into Wednesday with the high level of PM 2.5 -- ultrafine particles less than 2.5 micrometers in diameter -- expected to continue across the country due to the stagnant air over the peninsula and the inflow of particles from abroad.Se