EcoWatch: Despite the objections of environmentalists and after overcoming local opposition from fishermen, the Tokyo Electric Power Co. (TEPCO) pumped more than 850 tons of groundwater from below the Fukushima nuclear power plant into the Pacific Ocean on Monday. More than four years after a tsunami destroyed the plant and triggered a meltdown, the cleanup effort remains frought with numerous difficulties, including the nearly impossible task of dealing with the millions of gallons of contaminated and radioactive...