In this episode of Counting the Earth, we find out about forever chemicals – persistent pollutants that can pose serious environmental and health risks. Alice and Sue brave the icy freezers of the Predatory Bird Monitoring Scheme (PBMS) in Lancaster to meet UKCEH ecotoxicologist Lee Walker and discover how studying dead birds like buzzards and barn owls can offer critical clues about how these chemicals accumulate. They discuss innovative projects ensuring that future chemicals are designed to be sustainable from the start, and explore what actions individuals can take to reduce their exposure.   Listener discretion: this episode includes a detailed description of an autopsy performed on a dead bird.   Predatory Bird Monitoring Scheme website We are an independent, not-for-profit research institute and need your help to support this unique scheme: https://www.justgiving.com/campaign/predatory-bird-monitoring-scheme Hosts: Sue Nelson and Alice Hope  Producer: Rachael Buchanan Counting the Earth is a Boffin Media Production for the UK Centre for Ecology & Hydrology.