NAPERVILLE, Ill., Sep 20, 2010 (GlobeNewswire via COMTEX) -- Nalco (NYSE:NLC), providing essential expertise for water, energy and air, has been named among the leading sustainability companies in world. The Company was named to the Dow Jones Sustainability Index (DJSI) World Index for a third consecutive year and to the North America Index for the first time. "It is gratifying to be selected among the top sustainability companies in the world for a third time," said J.
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