Sulfides are chemical compounds that consist of sulfur combined with one or more metals or nonmetals. They are often found in nature as minerals, such as pyrite and galena, and can also be produced through industrial processes. Sulfides are important in various applications, including mining and metallurgy, as they can be sources of valuable metals. In addition to their industrial significance, sulfides can also have environmental impacts. Some sulfide minerals can release toxic substances when they are exposed to air and water, leading to issues like acid mine drainage. Understanding sulfides is crucial for both resource extraction and environmental protection.