Sulfur dioxide (SO2) is a colorless gas with a sharp, pungent smell. It is produced naturally by volcanic eruptions and is also released during the burning of fossil fuels, such as coal and oil. SO2 is an important compound in the atmosphere, as it can contribute to the formation of acid rain, which can harm ecosystems and buildings. In addition to its environmental impact, sulfur dioxide is used in various industrial processes. It serves as a preservative in food and beverages, particularly in dried fruits and wine. Furthermore, SO2 is utilized in the production of sulfuric acid, a key chemical in many manufacturing processes.