Criteria Pollutant: Sulfur Dioxide

Coal, oil and other fossil fuels contain sulfur. When these fuels are burned, sulfur dioxide is formed. Sulfur dioxide is emitted from power plants, oil refineries, foundries and steel mills. It is also emitted from natural sources, such as volcanoes.

Health and Other Effects
Sulfur dioxide has a bad odor and can irritate the respiratory system. It can:

• Constrict the bronchi and increase mucus flow, making breathing difficult
• Irritate the lungs and throat
• Increase respiratory illness
• Enhance the harmful effects of ozone

Children, the elderly, and those with lung disease are more susceptible.

Other effects

• Responsible for acid rain
• Damages plants
• Corrodes metals through creation of acids
• Damages stone, paint, fibers, paper, leather and electric components
• Reduces visibility

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