ScienceDaily: Frozen arctic soil contains nearly twice the greenhouse-gas-producing organic material as was previously estimated, according to recently published research by University of Alaska Fairbanks scientists. School of Natural Resources & Agricultural Sciences professor Chien-Lu Ping published his latest findings in Nature Geoscience. Wielding jackhammers, Ping and a team of scientists dug down more than one meter into the permafrost to take soil samples from more than 100 sites …