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Oct 19, 2006

World's most polluted cities? Try these 10

**ADVANCE FOR MONDAY, FEB. 9** Children play near their homes in La Oroya, Peru, Sept. 23, 2003. A smelter owned by St. Louis-based Doe Run Co. looms in the background. Community activists are concerned about lead, sulfur dioxide, cadmium and arsenic emissions generated by the smelter. Lead poisoning can cause behavior disorders, slow growth, impaired learning, anemia and kidney damage. (AP Photo)Three Russian cities on Wednesday made the top 10 of a list they'd rather not be on: most polluted cities of the world. Via MSNBC polluted cities?