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ME (South Korea). (June 30, 2020). Annual air pollution level of sulfur dioxide (SO2) in South Korea from 2008 to 2018 (in parts per billion) [Graph]. In Statista. Retrieved April 21, 2021, from https://www.statista.com/statistics/1019267/south-korea-so2-air-pollution-level/
ME (South Korea). "Annual air pollution level of sulfur dioxide (SO2) in South Korea from 2008 to 2018 (in parts per billion)." Chart. June 30, 2020. Statista. Accessed April 21, 2021. https://www.statista.com/statistics/1019267/south-korea-so2-air-pollution-level/
ME (South Korea). (2020). Annual air pollution level of sulfur dioxide (SO2) in South Korea from 2008 to 2018 (in parts per billion). Statista. Statista Inc.. Accessed: April 21, 2021. https://www.statista.com/statistics/1019267/south-korea-so2-air-pollution-level/
ME (South Korea). "Annual Air Pollution Level of Sulfur Dioxide (So2) in South Korea from 2008 to 2018 (in Parts per Billion)." Statista, Statista Inc., 30 Jun 2020, https://www.statista.com/statistics/1019267/south-korea-so2-air-pollution-level/
ME (South Korea), Annual air pollution level of sulfur dioxide (SO2) in South Korea from 2008 to 2018 (in parts per billion) Statista, https://www.statista.com/statistics/1019267/south-korea-so2-air-pollution-level/ (last visited April 21, 2021)
