Hydrogen sulfide is used primarily to produce sulfuric acid and sulfur. It is also used to create a variety of inorganic sulfides used to create pesticides, leather, dyes, and pharmaceuticals. Hydrogen sulfide is used to produce heavy water for nuclear power plants (like CANDU reactors specifically).
Hydrogen sulfide can also be used in agriculture as a disinfectant. It is also widely used in chemical analysis.
Iron smelters, landfills, food processing plants, and breweries are some examples of industrial sources that produce or use hydrogen sulfide
