jewel cigarettes The Smoking Alternative, unlike any E-Cigarette or Vape Juwel (cigarette) - Wikipedia

However, the presence of tobacco also means that it can be dangerous in the long term

Some of their uses are here

[78] Biocides are toxic chemical additives, typically heavy metals (though there is a push towards fouling-release technologies), which are added to prevent fouling attaching to the hull

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