Sulfur Dioxide (SO2)

Definition

Sulfur dioxide is a colorless gas with a pungent odor that is released into the atmosphere when fossil fuels containing sulfur are burned. It contributes to air pollution and can cause respiratory problems in humans.

Related terms

Acid deposition: The process by which acidic pollutants from sources like sulfur dioxide and nitrogen oxides are deposited onto Earth's surface through rain, snow, or fog.

Fossil fuels: Fuels formed from the remains of ancient plants and animals over millions of years. They include coal, oil, and natural gas.

Particulate matter: Tiny solid or liquid particles suspended in the air. Sulfur dioxide can react with other pollutants to form particulate matter, which can be harmful when inhaled.