Environment

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** FILE ** In this May 31, 2011, photo released Saturday, June 4, 2011, by Tokyo Electric Power Co. (TEPCO), a worker climbs scaffoldings set up around the decontamination device, having functions of nuclide adsorption and coagulation settling in the newly built radioactive water processing facilities at Fukushima Dai-ichi nuclear power plant in Okuma, Fukushima prefecture, northeastern Japan. (AP Photo/Tokyo Electric Power Co.)

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Greek Defence Minister Evangelos Venizelos enters the Parliament to attend an emergency meeting of Socialist lawmakers, in Athens, Thursday, June 16, 2011. Venizelos was appointed as new Finance Minister after Prime Minister George Papandreou reshuffled the Cabinet. (AP Photo/Dimitri Messinis)

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Peter Sarsgaard plays Dr. Hector Hammond, who becomes infected by fear-fueled yellow energy in "Green Lantern." (Associated Press)

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Flood waters from the nearby Missouri River cover a county highway on June 15, 2011, in Hamburg, Iowa. The water level continues to rise and officials say that it should crest sometime later this week. (Associated Press)

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K. Hovnanian Homes is building single-family homes with two to four bedrooms at Nassau Grove in Lewes, Del. The Charleston model, which has 1,450 square feet, is priced from $249,900.

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Mitchell & Best Homebuilders is building singe-family homes at Walnut Grove in Clarksville. The Eagle's Nest model, with 5,695 square feet, is priced from $1,099,900.

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The living room has a gas fireplace, track lighting and built-in bookshelves. The home's first and second levels have hardwood floors.

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Kaisei Kubota and his grandmother, Yae, pray Saturday for victims in the northeastern Japanese town of Miyako, part of an area devastated by the March 11 tsunami. (Kyodo News via Associated Press)

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In this photo taken June 14, 2011, China Alley is shown in Hanford, Calif. China Alley, a Chinese neighborhood in this small, rural town, once bustled with a temple, herb shops and gambling dens. Now what once was one of the biggest Chinatown's between San Francisco and Los Angeles has been named one of America's 11 most endangered historic places by the National Trust for Historic Preservation. (AP Photo/Gosia Wozniacka)

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Employees go about their business in Boeing Co.'s $750 million final assembly plant in North Charleston, S.C., on Friday. The company's new 787 jetliner assembly plant is at the center of a National Labor Relations Board dispute. (Associated Press)

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A ruptured levee on the Missouri River near Hamburg, Iowa, sends floodwaters over rural farmland on Monday, June 13, 2011. (AP Photo/Nati Harnik)

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In this photo taken on a government-organized tour, a damaged Libyan army vehicle sits behind a damaged wall next to a gas production plant outside the town of Janzour, near Tripoli, Libya, on Monday, June 13, 2011. The facility was struck by a NATO bomb on Saturday evening, according to plant's director. (AP Photo/Ivan Sekretarev)

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ASSOCIATED PRESS Smithsonian research botanist John Kress said the app that identifies American trees via smartphone pictures initially was meant as a way for scientists to discover new species in unknown habitats.

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W. John Kress displays the Leafsnap app on his iPhone along with tree leaf specimens at the Smithsonian Natural History Museum's specimen storage room in Washington. The free app "is going to be able to populate a database of every tree in the United States," he said. "I mean that's millions and millions and millions of trees, so that would be really neat." (Associated Press)

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** FILE ** South Carolina Gov. Nikki Haley speaks during the dedication of Boeing Co.'s $750 million final assembly plant in North Charleston, S.C., on Friday, June 10, 2011. (AP Photo/Bruce Smith)

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**FILE** In this photo from June 5, 2011, greenhouses at an organic farm that grows bean sprouts are photographed in the Uelzen district of northern Germany. (Associated Press)

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A firefighter sets a backfire Thursday in an effort to contain the Wallow Fire along Highway 260 near Eagar, Ariz. A spot fire at the edge of the larger blaze prompted the few residents left in Springerville and neighboring communities to flee. (Associated Press)