[The Hwankyung Ilbo] The National Institute of Environmental Research published a summary report of ‘Joint research project for Long–range Transboundary Air Pollutans in Northeast Asia (LTP)’ on November 20.
The LTP refers to a joint international research among South Korea, China and Japan to investigate air pollutants moving long distances in Northeast Asia and come up with countermeasures.
Scientists from South Korea, China and Japan analyzed long-term observation data from 2000 to 2017 at each country's concentration monitoring sites and found that the concentration of sulfur oxides (SO₂), nitrogen oxides (NO₂), fine dust (PM10) and ultrafine dust (PM2.5) have decreased in all three countries.
In particular, the annual average concentration of ultrafine dust (PM2.5) in each country on a nationwide scale decreased by 12% in Korea and 22% in China in 2018 compared to 2015, while that of Japan decreased by 12% in 2017 compared to 2015.
According to an analysis of the domestic and foreign influences of major cities in the three countries on ultrafine dust (PM2.5) using the air quality model technique in 2017, self-contribution rate was 51% in Korea, 91% in China, 55% in Japan on an annual basis.
“This report is meaningful in that it is the first report jointly conducted by researchers from Korea, China and Japan and published by the three governments together after reviewing the research results,” said Chang Yoon-seok, president of the National Institute of Environmental Research. “We expect the report to be a valuable scientific basis for consultations among countries on improving air quality in Northeast Asia, including fine dust.”
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