When the debate over drilling in the Arctic National Wildlife Refuge first emerged, most people had never heard of global warming. So over the last four decades, the controversies over oil in the Refuge and climate change evolved on different tracks. 

Now, those tracks are intersecting. We dive into the resulting tensions and contradictions around oil and climate in this final episode of our series on the Refuge.

Learn more about Threshold on our website. Our reporting is made possible by listeners like you. Become part of our passionate network of supporters here. 

This series was produced in partnership with the Pulitzer Center.