File talk:OLIN-MATHIESON PLANT EMITS SULPHUR FUMES - NARA - 546107.tif
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Sulphur fumes[edit]
What we see on the picture is nitrogen dioxide, as expected with a production using nitric acid. Sulphur itself doesn't give fumes, sulphur oxides are colourless. In addition, nitrogen dioxide is much more toxic. --FK1954 (talk) 10:43, 6 June 2016 (UTC)