Environment

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In this photo taken Sunday, March 13, 2011, a member of the Japan Air Self-Defense Force rescues a victim in Ishinomaki, in northern Japan, two days after a powerful earthquake-triggered tsunami hit the country's east coast. (AP Photo/The Yomiuri Shimbun, Makoto Kondo)

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The body of a man from the village of Saito in northeastern Japan lies among the rubble on Monday, March 14, 2011. Rescue workers used chain saws and hand picks to dig out bodies in Japan's devastated coastal towns, as Asia's richest nation faced a mounting humanitarian, nuclear and economic crisis in the aftermath of a massive earthquake and tsunami that likely killed thousands. (AP Photo/David Guttenfelder)

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Japan Self-Defense Force members carry the body of a victim in Kamaishi, in northern Japan, on Monday, March 14, 2011, three days after a powerful earthquake-triggered tsunami hit the country's east coast. (AP Photo/The Yomiuri Shimbun, Daisuke Uragami)

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In this March 13, 2011, photo, a man walks by the Japanese word meaning "food" drawn over fading sign of SOS marked on the ground in Rikuzentakata in Japan's Iwate Prefecture on Monday, three days after a powerful earthquake and tsunami that hit the country's northeast coast. (AP Photo/The Yomiuri Shimbun, Motoki Nakashima)

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The rubble caused by an earthquake and tsunami fill the landscape in Yamada, Iwate Prefecture, Japan, on Monday, March 14, 2011, three days after northeastern coastal towns were devastated by an earthquake and tsunami. (AP Photo/Kyodo News)

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A man reacts while looking at a stock price board in Tokyo on Monday, March 14, 2011, as the Tokyo stock market plunged on its first business day after an earthquake and tsunami of epic proportions laid waste to cities along Japan's northeast coast. Only stock prices of construction and housing business showed upward trend (in red digits). (AP Photo/Eugene Hoshiko)

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A female evacuee covers her face at a shelter in a temple on Monday, March 14, 2011, in Higashimatsushima, Miyagi Prefecture, Japan, on Monday, March 14, 2011, three days after northeastern coastal towns were devastated by an earthquake and tsunami. (AP Photo/Kyodo News)

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Evacuees gather around the candlelight at a blacked-out shelter on Monday, March 14, 2011, in Yamamoto, Miyagi Prefecture, Japan, on Monday, March 14, 2011, three days after northeastern coastal towns were devastated by an earthquake and tsunami. (AP Photo/Kyodo News)

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Relatives react as they reunite at a shelter in Kesennuma in Japan's Miyagi Prefecture on Monday March 14, 2011, three days after northeastern coastal towns were devastated by an earthquake and tsunami. (AP Photo/Kyodo News)

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A man consoles a woman after she saw only the base of her house left in Noda village in northern Japan on Monday, March 14, 2011, three days after a powerful earthquake-triggered tsunami hit the country's east coast. (AP Photo/The Yomiuri Shimbun, Yoichi Hayashi)

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An unidentified mother watches her baby, who was born on March 2 at a shelter in Iwaki, in Japan's Fukushima Prefecture, on Monday, March 14, 2011, three days after northeastern coastal towns were devastated by an earthquake and tsunami. (AP Photo/Kyodo News)

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Houses and infrastructure devastated by a strong earthquake and tsunami are seen in Otsuchi, in Japan's Iwate Prefecture, on Monday, March 14, 2011, three days after northeastern coastal towns were devastated by the earthquake and tsunami. (AP Photo/Kyodo News)

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Japan Self-Defense Force members search for missing people before they use heavy machinery in Noda village in northern Japan on Monday, March 14, 2011, three days after a powerful earthquake-triggered tsunami hit the country's east coast. (AP Photo/The Yomiuri Shimbun, Yoichi Hayashi)

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Japanese emergency crews work to free a body pinned among concrete sea barriers on Monday, March 14, 2011, in Toyoma, Japan, three days after a giant quake and tsunami struck the country's northeastern coast. (AP Photo/Gregory Bull)

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A tsunami survivor sits down in the rubble in Yamadamachi in Japan's Iwate Prefecture on Monday, March 14, 2011, three days after a powerful earthquake-triggered tsunami hit the country's east coast. (AP Photo/The Yomiuri Shimbun, Takashi Ozaki)

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A photo hangs from the remains of a house in the seaside town of Toyoma in northern Japan on Monday, March 14, 2011, three days after a giant quake and tsunami struck the country's northeastern coast. (AP Photo/Mark Baker)

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A woman crosses over a tsunami-hit railway track of the Japan Railway Ofunato line in Ofunato, Iwate Prefecture, Japan, Monday, March 21, 2011, after the March 11 earthquake and tsunami. (AP Photo/Koji Sasahara)

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A boat is carried by a tsunami surge on the harbor in Santa Cruz, Calif., Friday, March 11, 2011. A tsunami caused by an earthquake in Japan resulted in warnings as far away as the United States' west coast. (AP Photo/Marcio Jose Sanchez)

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In this image made from Japan's NTV/NNN Japan television footage, smoke ascends from the Fukushima Dai-ichi nuclear plant's Unit 3 in Okumamachi, Fukushima Prefecture, in northern Japan on Monday, March 14, 2011. The second hydrogen explosion in three days rocked the stricken nuclear plant Monday, sending a massive column of smoke into the air and wounding 11 workers. (AP Photo/NTV/NNN Japan)