Sulphur/ˈsʌlfər/ Definition 1 of 2Pro Tip 1/3Natural Occurrences Sulphur is commonly found around volcanic areas and hot springs. Tourists visit Yellowstone to see the sulphur geysers. Pro Tip 2/3Industrial Use Sulphur is a key ingredient in industrial processes like making fertilizers. The factory processes tonnes of sulphur annually for fertilizers. Pro Tip 3/3Characteristic Smell Sulphur is associated with a distinct, pungent odor, often likened to rotten eggs. A sulphur leak at the plant caused a widespread foul smell.