PM2.5 air pollutant reaches record high in March

The average concentration of PM2.5 harmful particles in the air reached the highest level in Seoul last month since it began to be observed in 2015, according to data released Monday by a state-run think tank. The National Institute of Environmental Research said the average concentration of PM2.5, particles that are smaller than 2.5 microns […]

1 April , 2019Comments Off on PM2.5 air pollutant reaches record high in MarchRead More