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FILE - In this May 30, 2009 file photo, a girl pulls a water container through stagnant water at Laxmikhali village in Shatkhira, 176 kilometers (109 miles) southwest of Dhaka, Bangladesh. Ponds dug for fish rearing and storing water for agriculture in Bangladesh are a primary source of arsenic-contaminated drinking water which has caused widespread poisoning in the densely populated South Asian nation, according to a study released Sunday. (AP Photo/Pavel Rahman, File)