Science and climate reporter J. Madeleine Nash discusses her story for High Country News, “An unfrozen North.” Nash looks at the science of climate change where it’s happening the fastest: Alaska’s permafrost-laden Arctic. Melting glaciers aren’t the only environmental crisis on our hands; it turns out that thawing permafrost could release as much carbon as has entered the atmosphere since the Industrial Revolution. This segment is guest hosted by Jonathan Capehart.