"f5717312-c3ca-4492-a166-9f17c6d9b273" . "SULFUR DIOXIDE"^^ . "Sulfur dioxide (SO2) is a non-inflammable colorless gas. SO2 is\nusually oxidized by ozone and hydrogen peroxide to form sulfur trioxide, a\nsecondary pollutant that is extremely soluble in water. Droplets of\nsulfuric acid (acid rain) are formed when sulfur oxides are present in\nthe atmosphere. The production of SO2 originating from coal-fired power\nplants and other fossil fuel combustion is largely responsible for\nthe damage caused by acid rain. Volcanic eruptions also provide a source\nof sulfur dioxide in the atmosphere but are insignificant when compared\nto anthropogenic sources. [Science; v265; 497-9; 1994.] [Nature;\nv366;327-9; 1993.]"^^ . .