Environment

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In this image made available by the University of Edinburgh on Tuesday March 24, 2015, shows an artist's rendition of a previously unknown species of crocodile-like "super salamander" that roamed the Earth more than 200 million years ago. (AP Photo/University of Edinburgh, Marc Boulay Cossima Productions)

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Small boats sit on the shore of Guanabara Bay near the suburb of Sao Goncalo, across the bay from Rio de Janeiro, Brazil, Monday, March 23, 2015. Authorities promised in Rio’s winning bid to drastically clean up the pollution in Guanabara bay, cutting it by 80 percent. But with 500 days left before the games, experts say efforts have had little impact on the garbage and sewage pollution of the waters where sailing, swimming and other aquatic events will take place. (AP Photo/Felipe Dana)

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A rockslide at Arch Rock within Point Reyes National Seashore on the Northern California coast north of San Francisco killed on hiker and seriously injured another Sunday. (Associated Press)

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Republicans say the Environmental Protection Agency erred by not consulting with the Fish and Wildlife Service in designing its so-called Clean Power Plan because the proposal almost surely will force the closure of coal-fired power plants and subsequently reduce the warm water Florida's manatees need to survive during cold winter months. (Associated Press)

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Ohio Gov. John Kasich won a landslide re-election to a second term last year, proving his popularity in a state considered pivotal for a Republican presidential candidate to win. (Associated Press)

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Actor Mark Ruffalo has been one of the protesters of proposed fracking in New York. At a New Yorkers Against Fracking rally in Albany, the group called on Gov. Andrew Cuomo to ban hydraulic fracturing. Mr. Cuomo gave in to the pressure and imposed a ban a month after his re-election. (Associated Press)

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A bull wood bison weighing upward of 2,000 pounds chews hay at the Alaska Wildlife Conservation Center on Friday, March 20, 2015, in Portage, Alaska. (AP Photo/Dan Joling)

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Interior Secretary Sally Jewell speaks in Anchorage, Alaska, on Feb. 17, 2015. (Associated Press) **FILE**

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In this June 25, 2012, file photo, a crew works on a gas drilling rig at a well site for shale based natural gas in Zelienople, Pa. (AP Photo/Keith Srakocic, File)

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National Edition News cover for March 21, 2015 - Republicans blast new Interior fracking safety rules as unnecessary job-killers: In this March 29, 2013 photo, a rig drills for natural gas which will eventually be released using hydraulic fracturing, or fracking, on leased private property outside Rifle, in western Colorado. Once drilling is completed, wells are fractured to allow the flow of gas from deposits typically more than a mile underground. (AP Photo/Brennan Linsley)

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FILE - In this June 25, 2012 file photo, a crew works on a gas drilling rig at a well site for shale based natural gas in Zelienople, Pa. The Obama administration is requiring companies that drill for oil and natural gas on federal lands to disclose chemicals used in hydraulic fracturing operations. A final rule released Friday also updates requirements for well construction and disposal of water and other fluids used in fracking, a drilling method that has prompted an ongoing boom in natural gas production. (AP Photo/Keith Srakocic, File)

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Freshman Melo Trimble, a native of Upper Marlboro, Maryland, has led the Maryland Terrapins to a 27-6 record and a No. 4 seed in the Midwest region of the NCAA tournament. (Associated Press)

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Former California Gov. Arnold Schwarzenegger's U.S. Forest Ranger jacket hangs on the podium before an Oct. 30, 2013 ceremony at the Agriculture Department in Washington where he was named the U.S. Forest Service's third honorary Forest Ranger for his leadership on climate change. (Associated Press)

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Donald Trump has launched a presidential exploration committee with all the trimmings — complete with a trip to New Hampshire. (NBC photo)

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The Obama administration has been skeptical of the proposed Asian Infrastructure Investment Bank from the start, arguing that it could prove redundant and could undercut lending standards on such issues as worker protections and the environment. (Associated Press)

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Britain’s Prince Charles departs after speaking at a meeting of companies, leading environmental organizations and government figures brought together to consider actions to address the threat posed by marine plastic waste, Wednesday, March 18, 2015, at the Hay Adams Hotel in Washington. (AP Photo/Andrew Harnik)