Environment

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Boats tack for position before the start of the Newport Ocean Sailing Association's Newport-to-Ensenada yacht race on Friday, April 27, 2012, in Corona Del Mar, Calif. (AP Photo/The Orange County Register, Ken Steinhardt)

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This Thursday, April 26, 2012, photo provided by the CU Independent shows a bear that wandered into the University of Colorado Boulder, Colo., dorm complex Williams Village falling from a tree after being tranquilized by Colorado wildlife officials. (AP Photo/CU Independent, Andy Duann)

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Turkish Energy Minister Taner Yildiz (left) joins Turkish Cypriot leader Dervis Eroglu (second from right) on a drilling platform Thursday to mark the start of exploratory oil and gas drilling by Turkey in the northern half of ethnically split Cyprus. (Associated Press)

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North Korean soldiers stand guard at the Demilitarized Zone that separates the two halves of the Korean Peninsula at Panmunjom, North Korea. The building in the background stands in the South. (Associated Press)

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A plate of pancakes with blueberries and granola mixed in the batter is displayed in Concord, N.H. (AP Photo/Matthew Mead)

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Robert Ward displays on April 25, 2012, one of two pieces of a meteorite he found at a park in Lotus, Calif. The meteor was probably about the size of a minivan when it entered the Earth's atmosphere three days earlier with a loud boom at about 8 a.m. (Associated Press)

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** FILE ** Ulysses Dublin, one of four full-time Massport wildlife technicians, fires a nonlethal pyrotechnic round from a standard shotgun to disperse birds from the runways and surrounding areas at Boston's Logan International Airport in January 2009. (AP Photo/Pool, John Tlumacki)

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Sandbags sit stacked along the seawall in Kivalina, Alaska, in September 2007. The island town has accused a handful of mostly U.S. energy companies of contributing to global warming though greenhouse gas emissions, which it says has rendered the town uninhabitable. (Associated Press)

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The eroding bank of the Ninglick River at Newtok, Alaska, has long been a problem for the village 480 miles west of Anchorage and other Alaska communities. Erosion is attacking Kivalina as well as Newtok so rapidly that residents could be forced to seek refuge elsewhere. (Associated Press)

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The Alaskan island town of Kivalina argues that companies "knew or should have known of the impacts of their emissions on global warming." (Associated Press)