2SO2

2SO2 refers to two molecules of sulfur dioxide. Sulfur dioxide (SO2) is a chemical compound with the formula SO2. It is a colorless gas with a pungent, irritating odor. Sulfur dioxide is a significant air pollutant, primarily produced from the combustion of fossil fuels containing sulfur, such as coal and oil. It is also a byproduct of industrial processes like smelting metal ores and the production of sulfuric acid.

In the atmosphere, SO2 can be converted into sulfuric acid, which contributes to acid rain. Acid rain can damage ecosystems, buildings, and human health. Regulations are in place in many countries to limit SO2 emissions from power plants and industrial facilities. Despite its environmental concerns, sulfur dioxide has some industrial applications, including its use as a preservative for dried fruits and as a bleaching agent. It is also used in the production of sulfuric acid, a vital industrial chemical.