FILE -In this Thursday, Sept. 11, 2008, file photo, a truck leaves the Dow Chemical plant in Freeport, Texas. The Dow Chemical Co. reports quarterly financial results before the market opens on Thursday, April 25, 2013. (AP Photo/Pat Sullivan, File)

Associated Press
FILE -In this Thursday, Sept. 11, 2008, file photo, a truck leaves the Dow Chemical plant in Freeport, Texas. The Dow Chemical Co. reports quarterly financial results before the market opens on Thursday, April 25, 2013. (AP Photo/Pat Sullivan, File)
FILE -In this Thursday, Sept. 11, 2008, file photo, a truck leaves the Dow Chemical plant in Freeport, Texas. The Dow Chemical Co. reports quarterly financial results before the market opens on Thursday, April 25, 2013. (AP Photo/Pat Sullivan, File)
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