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      Scientific American November 1995

      Sewage Treatment Plants

      Algae offer a cheaper way to clean up wastewater

      • By W. Wayt Gibbs on November 1, 1995

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      More in the November 1995 issue of Scientific American
      • 50, 100 and 150 Years Ago: Oxygen Tents for Premature Babies, Importance of Earthworms and News of the Potato Famine
      • Coming through Madness
      • God's Utility Function
      View Full Contents
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