Earlier this month, a new interagency report was delivered to Congress that warns of the growing threat of low oxygen "dead zones" in coastal waters around the U.S. This condition is known as hypoxia -- where oxygen levels drop so low that creatures in the water are stressed or killed. In this episode, we hear from two of the scientists behind the report: Dr. Libby Jewett from NOAA and Herb Buxton from the US Geological Survey. They help us learn more about the extent of this problem, its causes, and how this trend might be reversed.