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In this photo provided by Tokyo Electric Power Co. (TEPCO), underground water is being released into the ocean through a piping at Fukushima Dai-ichi nuclear plant in Okuma, Fukushima prefecture, northern Japan Wednesday, May 21, 2014. Japan’s crippled nuclear power plant has begun releasing groundwater from the least contaminated areas of the facility into the ocean so it does not run into contaminated areas and create more toxic water amid storage space limitations. (AP Photo/Tokyo Electric Power Co. )