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ME (South Korea). (June 30, 2020). Annual air pollution level of ozone (O3) in Busan in South Korea from 2008 to 2018 (in parts per billion) [Graph]. In Statista. Retrieved April 16, 2021, from https://www.statista.com/statistics/1019756/south-korea-ozone-air-pollution-level-busan/
ME (South Korea). "Annual air pollution level of ozone (O3) in Busan in South Korea from 2008 to 2018 (in parts per billion)." Chart. June 30, 2020. Statista. Accessed April 16, 2021. https://www.statista.com/statistics/1019756/south-korea-ozone-air-pollution-level-busan/
ME (South Korea). (2020). Annual air pollution level of ozone (O3) in Busan in South Korea from 2008 to 2018 (in parts per billion). Statista. Statista Inc.. Accessed: April 16, 2021. https://www.statista.com/statistics/1019756/south-korea-ozone-air-pollution-level-busan/
ME (South Korea). "Annual Air Pollution Level of Ozone (O3) in Busan in South Korea from 2008 to 2018 (in Parts per Billion)." Statista, Statista Inc., 30 Jun 2020, https://www.statista.com/statistics/1019756/south-korea-ozone-air-pollution-level-busan/
ME (South Korea), Annual air pollution level of ozone (O3) in Busan in South Korea from 2008 to 2018 (in parts per billion) Statista, https://www.statista.com/statistics/1019756/south-korea-ozone-air-pollution-level-busan/ (last visited April 16, 2021)
