Sulfur dioxide (SO2) results from the combustion of fuels that contain sulfur, primarily from burning coal in power plants. SO2 can react in the atmosphere to form a secondary pollutant known as sulfuric acid (H2SO4), which also contributes to acid deposition. Sulfur dioxide and sulfuric acid aerosols or droplets reduce visibility, damage crops and trees, corrode metals, damage exterior surfaces, and cause respiratory problems.
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Sulfur Dioxide (SO2)