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Experts: Low-head dams a threat to safety nationwide

Susie C. Spear Low-head dams, such as the 8-foot-high structure at Duke Energy’s Dan River Steam Station, are a threat to public safety, claiming nearly 50 lives nationwide each year, say civil engineers and dam safety advocates. Their aim: to educate the public about the hazards of low-head dams and convince dam owners to rehabilitate the structures. On June 16, nine members of an Eden family set out on the Dan River in tubes for a two-hour float that turned deadly when the group went over the Duke Energy dam. Four survived, and rescue teams worked for five days to recover the bodies of four of five missing tubers, including a 7-year-old boy. The search for Teresa Villano, 35, continued this past week near Draper Landing along the Dan River along N.C. 700.

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WOODY MARSHALL photos, NEWS & RECORD  Ruben Villano is embraced at the prayer vigil for victims of the June 16 Dan River tubing accident in Eden. Villano was in the group of nine tubers floating down the river that went over a dam. Four people, including Villano, were rescued from the water the next day. Four bodies were recovered and one person remains missing. WOODY MARSHALL, NEWS & RECORD  Elias Meadows, 4, holds a candle at the prayer vigil Saturday for the victims of the June 16 Dan River tubing accident in Eden. WOODY MARSHALL, NEWS & RECORD  Greensboro News & Record Angelica Villano thanks everyone for

Mysterious Nature of Greenhouse Permafrost Hidden Beneath Arctic Ocean Explored by Scientists

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Zombie greenhouse gas lurks in permafrost beneath the Arctic Ocean

Zombie greenhouse gas lurks in permafrost beneath the Arctic Ocean Nicoletta Lanese © Provided by Live Science The coastline of the Bykovsky Peninsula in the central Laptev Sea, Siberia Millions of tons of organic carbon and methane beneath the Arctic Ocean thaw out and ooze to the surface each year. And climate change could speed up this release of greenhouse gases, new research suggests.  The carbon tied up in organic matter and methane (a carbon atom bound to four hydrogen atoms) are currently trapped in subsea permafrost, which is frozen sediment that became covered by 390 feet (120 meters) of seawater toward the end of the Paleolithic ice age about 1,800 to 1,400 years ago, according to the U. S. Geological Survey (USGS). Most subsea permafrost sits on the continental shelf under the Arctic Ocean, said study author Sayedeh Sara Sayedi, a doctoral student in the department of plant and wildlife science at Brigham Young University in Salt Lake City. 

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