This week, we take another look at water, and what happens to it after it goes down the drain. Researcher Liz Borkowski joins us for a look at the connection between sewage and civilization, and the struggle to introduce modern sanitation in the developing world. And we’ll talk to Dr. Alistair Boxall, about the sources and effects of pharmaceutical contaminants in the environment.

Unfortunately, we had some issues with Dr. Boxall's recording that we couldn't overcome in post-production. As a result, his interview is not up to our usual technical standards. We apologize for the inconvenience.