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"CF Industries Receives Louisiana and Iowa Air Permits  DEERFIELD, Ill.--(BUSINESS WIRE)-- CF Industries Holdings, Inc. (NYS: CF) today reported that regulators in Louisiana and Iowa have issued"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.aol.com/article/2013/07/16/cf-industries-receives-louisiana-and-iowa-air-perm/20667304/>