Environment

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**FILE** Madelaine O'Neal, a freshman from St. Louis, Mo., studies outside the book store at the University of Colorado in Boulder on Oct. 1, 2008. (Associated Press)

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Riverdance returns to Wolf Trap for its annual engagement. **FILE**

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Association Press Coal River Mountain (left) forms the backdrop for a mountaintop coal-mining site at Kayford Mountain, W.Va.

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getty images photographs More than 2.5 million people have been driven into refugee camps as a result of the Sudanese government's scorched-earth policy in the troubled Darfur region. The policy has flattened villages and killed about 300,000 people.

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** FILE ** Brazilian sailors recover debris from the missing Air France Airbus jet in the Atlantic Ocean in June 2009 in this photo released by the Brazilian air force. (AP Photo)

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North Korea's spent nuclear fuel rods, kept in a cooling pond, are seen at the nuclear facilities in Yongbyon. (Yonhap News Agency via Associated Press/File)

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Credit-card stickers announce a variety of options for charging the cost of a visit to a bowling alley in Palo Alto, Calif.

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** FILE ** D.C. firefighters (from top) Lt. Brian Alston, Ryan Doyle, Greg Smith and Shawn Welch attempt to drain the entrance area of a flooded residence in the Adams Morgan area in this 2009 file photo.

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**FILE** This Monday, May 22, 2006 file photo provided by Mary Sage shows a polar bear watching a whaling crew off shore near Barrow, Alaska. Polar bears were declared as a threatened species by the Interior Department on Wednesday, May 14, 2008 saying polar bears must be protected because of the decline in Arctic sea ice from global warming. (AP Photo/Courtesy of Mary Sage, Joseph Napaaqtuq Sage) ** NO SALES **

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Former Vice President Al Gore testifies on climate change before the House Energy and Commerce Committee on Friday. He threw his support behind the pending climate-change-prevention bill. (ALLISON SHELLEY/THE WASHINGTON TIMES) ** FILE **

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Planet Earth. (Associated Press) ** FILE **

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A woman holds palm fronds and a Bible during Palm Sunday celebrations in Port-au-Prince, Haiti. (AP Photo/Ramon Espinosa)

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U.S. NAVY The USS Chung-Hoon sails the Gulf of Mexico during her builder's sea trials in 2004. Last week, the destroyer came to the aid of a U.S. ocean surveillance ship being harassed by Chinese vessels in the South China Sea.

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** FILE ** Van Jones focused on green jobs, enterprise and innovation as a special adviser on the Council on Environmental Quality.

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Pylons carry electrical power lines from a California Department of Power and Water generating plant in Long Beach. The stimulus bill signed by President Obama in mid-February includes $11 billion for improvements to the national power transmission grid - an investment many policymakers label as an essential component of increasing green energy and efficiency. (Bloomberg News)

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** FILE ** A South Korean army officer stands guard at the Inter-Korean Transit Office in Paju, South Korea, near North Korea's border city of Kaesong, on Sunday, March 15, 2009. (AP Photo/Ahn Young-joon)

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**FILE** In this photo from Oct. 2, 2000, Anna Nicole Smith (right) smiles as she walks to the courthouse with her attorney Howard K. Stern in Houston.

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**FILE** Natalie Theys, 19, environmental student at Connecticut College, and thousands of young leaders from across the country rally on the West Lawn of the U.S. Capitol to demand that President Obama and Congress pass bold federal climate and energy legislation in 2009 that will dramatically reduce carbon emissions and create millions of green jobs. (The Washington Times)