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Atmospheric Pollutants Essay title: Atmospheric Pollutants 1.Gases in The Air Sources of Sulfur Dioxide There a diverse range of natural sources of sulfur dioxide in the atmosphere such as from volcanic gases: S(s) + O2(g) ( SO2 (g), geysers and combustion of organic matter in bushfires. Also, anaerobic bacteria in poor aerated soil oxidize H2S.