In this special episode of Climate Discourse, Kate speaks with Joe DiMento about his new book Polar Shift: The Arctic Sustained. Joe explains how his previous work on regional seas, his travels in the arctic  and the increasing importance of the region  inspired his work. They also discuss the challenges in defining the region, some of the most pressing legal issues, the  existing legal gaps and the tremendous impact the region has on the rest of the world, environmentally, politically and legally.Joe DiMento is a Professor in the Environmental Studies Department at the University of California, Irvine.