MAURO FERMARIELLO / SCIENCE PHOTO LIBRARY MAURO FERMARIELLO / SCIENCE PHOTO LIBRARY
Sulphur rocks. Pile of sulphur rocks in a volcanic region. Elemental sulphur is produced around volcanoes by the condensation of sulphur- rich gases. Sulphur is used in industry to produce fertilisers and dyes. It is mainly used to manufacture sulphuric acid. Photographed at the Solfatara volcano, Campi Flegrei, Italy.
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