FILE - In this March 20, 2011 aerial file photo taken by a small unmanned drone and released by AIR PHOTO SERVICE, the crippled Fukushima Dai-ichi nuclear power plant is seen in Okumamachi, Fukushima ... more 
FILE - In this March 20, 2011 aerial file photo taken by a small unmanned drone and released by AIR PHOTO SERVICE, the crippled Fukushima Dai-ichi nuclear power plant is seen in Okumamachi, Fukushima prefecture, northeastern Japan. From top to bottom: Unit 1, Unit 2, Unit 3 and Unit 4. Worldwide calls to curb nuclear power amid Japan's plant crisis could be bad news for the environment unless nations finally go all-out to tap wind, solar and other clean, renewable energy, climate change negotiators and activists say. less 
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Associated Press | Photo By AIR PHOTO SERVICE, File
Fri, Apr 8, 2011 7:31 AM EDT