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TRINH, Le Hung, NGUYEN, Duc Anh and NGUYEN, Thi Thu Nga. Mapping the concentration of nitrogen dioxide (NO2) in the air over the Nghi Son and Dung Quat refineries using Sentinel-5P Tropomi satellite data. Ecological Questions. Online. 26 November 2025. Vol. 37, no. 1, pp. 1-16. [Accessed 20 January 2026]. DOI 10.12775/EQ.2026.001.