New Hampshire
How one of the coldest places on earth is contributing to global warming
Ruth Varner, a professor at the University of New Hampshire, traveled north of the Arctic Circle in Sweden this summer to study methane emissions from thawing permafrost.
Ground that typically remains frozen throughout the year is starting to thaw as a result of warmer temperatures brought about by climate change, Varner said. And the thaw, in turn, can release methane and carbon dioxide, emissions that make climate c... [2406 chars]