In this episode of the State of the Earth podcast, Sophie and Mark are joined by Tiago De Melo Cartaxo, a Senior Lecturer in Environmental Law at the University of Exeter. They discuss Tiago's professional background, the concept of UNESCO biospheres, and the potential for Cornwall and the Isles of Scilly to be designated as such a reserve. The conversation explores the benefits of biosphere status, including improved conservation, economic development, and community engagement. Tiago shares his experiences working on biosphere projects in Portugal and offers insights on the steps required for Cornwall to achieve this designation. The discussion highlights the importance of stakeholder collaboration, cultural heritage conservation, and research in sustaining biodiversity and environmental justice.