Dioxide refers to a chemical compound that contains two oxygen atoms bonded to another element. The most common example is carbon dioxide (CO₂), which is produced by the respiration of living organisms and the combustion of fossil fuels. Dioxides play a significant role in various natural processes, including the carbon cycle and photosynthesis. In addition to carbon dioxide, there are other types of dioxides, such as silicon dioxide (SiO₂), commonly found in sand and quartz. Dioxides can be important in industrial applications, including the production of glass and ceramics, as well as in environmental science for understanding air quality and climate change.