Duigan, Barbara, Sivakumar Kansdasami Sangeetha, and Venkataraman Sivakumar. “Decreasing Trend in SO2 Concentrations over Durban: 2004 - 2014”. Clean Air Journal 33, no. 2 (December 21, 2023). Accessed May 14, 2024. https://cleanairjournal.org.za/article/view/15451.