Dr. Denise Hardesty is a principal researcher at CSIRO Oceans & Atmosphere in Hobart, Tasmania. She's done extensive research over the years on marine plastic debris by studying sea birds, sea turtles, and waste reduction campaigns.

We discuss what happens when certain marine animals digest plastic, whether it's safe for us to eat seafood that contains plastic, and what it's like to be a distinguished scientist in the field of marine debris research.