When we think about waterway pollution, things like paracetamol and caffeine probably aren’t the first things that come to mind – but they’re among the alarmingly long list of pharmaceuticals and consumables that are literally passing through our bodies and into waterways.

Ecotoxicologist Dr Frederic Leusch joins us to talk about what’s turning up, why it’s turning up, where it’s turning up, and what it means for aquatic critters.