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Sulfur Dioxide, a colorless, nonflammable gas that has a sharp, pungent odor. It is easily liquefied and is a good solvent for many organic compounds. Sulfur dioxide gas is used in the production of sulfuric acid, in the manufacture of pulp, and as a preservative... Full Article at How Stuff Works
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U.S. particulate pollution isn't the deadly threat it once was, but the dangerously tiny specks still often plague big cities as well as rural wilderness. Being such ambitious apes, however, we were only satisfied by wood fires for so long. Full Article at Plenty
