Environment

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** FILE ** Sen. Kelly Ayotte, New Hampshire Republican, speaks with reporters after a closed-door meeting with U.N. Ambassador Susan E. Rice about the deadly Sept. 11 raid in Libya, at the Capitol in Washington on Tuesday, Nov. 27, 2012. (AP Photo/J. Scott Applewhite)

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The Korea Space Launch Vehicle-1 sits on its launch pad at the Naro Space Center in Goheung, South Korea, on Thursday, Nov. 29, 2012. South Korea on Thursday scrapped an attempt to fire its first satellite into orbit from its own soil amid speculation that North Korea was preparing to fire its own long-range rocket. (AP Photo/Yonhap, Shin Jun-hee)

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The Rockefeller Center Christmas Tree is lit during the 80th annual tree lighting ceremony at Rockefeller Center in New York, Wednesday, Nov. 28, 2012. (AP Photo/Kathy Willens)

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Craftmark Homes is building 16 single-family homes at Fairview Manor in Bowie. The Kenwood model, which has 5,136 square feet, is priced from $656,900.

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A white rhinoceros grazes in Nairobi National Park in Kenya. Africa’s rhinos are being killed in record numbers for their horns, and the problem is especially dire in South Africa, which contains about 90 percent of the rhinos on the continent. Poaching there has soared from 15 a year in 2007 to 588 so far this year. Asians, especially Vietnamese, pay the equivalent of the U.S. street value of cocaine for the horns, whose keratin is reputed to cure cancer and also ease hangovers and fever. (Associated Press)

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In this photo released by the Syrian official news agency SANA, a Syrian soldier (right) and others gather at an alley that was destroyed by two cars bombs in Jaramana neighborhood of Damascus, Syria, on Wednesday, Nov. 28, 2012. (AP Photo/SANA)

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In this photo released by the Syrian official news agency SANA, Syrians gather at an alley destroyed by two cars bombs in the Jaramana neighborhood of Damascus, Syria, on Wednesday, Nov. 28, 2012. (AP Photo/SANA)

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Homes on the Rockaway Peninsula in the Queens borough of New York were ravaged by Superstorm Sandy. Building inspectors trained in Fairfax were sent to New York in recent weeks to assess damage. (Associated Press)

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Associated Press Iowa GOP Gov. Terry Branstad wrote an editorial in The Hill arguing that killing subsidies for wind power would leave it as “the only energy source without federal tax support.”

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The undated diagram that was given to the AP by officials of a country critical of Iran's atomic program allegedly calculates the explosive force of a nuclear weapon — a key step in developing such arms. The diagram shows a bell curve and has variables of time in microseconds and power and energy, both in kilotons, the traditional measurement of the energy output and hence the destructive power of nuclear weapons. The curve peaks at just above 50 kilotons at around 2 microseconds, reflecting the full force of the weapon being modeled. The Farsi writing at the bottom translates as "Changes in output and in energy released as a function of time through power pulse." (AP Photo)

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A protester holding a Greek national flag walks next to graffiti reading "Power at the peoples hands " during clashes in front of the Greek parliament in Athens, Wed. Nov.7 2012. (AP Photo/Kostas Tsironis)