Among Seoul’s subway lines, No. 1 has worst fine dust in air: data
Social affairsDec 17, 2021
Seoul’s Subway Line No. 1 posted the highest concentration of fine dust among all eight lines operated by Seoul Metro this year, data showed Thursday. Subway Line No. 1 recorded an annual average of 74 micrograms per cubic meter of dust particles smaller than 10 micrometers in diameter, or PM10. The reading was higher than last year’s 66.6 micrograms, data from the operator of the eight subway l...