Climate change is a fact of life for all of us these days. But the changes so far are most dramatic in the Arctic. And that’s mostly bad news — both for the people who live there and for the rest of us. This fall, The World is teaming up with the podcast Threshold to take an in-depth look at life in the Arctic as the region undergoes a big melt. For an introduction to the series, host Marco Werman spoke with Threshold’s host and creator Amy Martin.