21/07/2015

Available for over a year

Tom Holland is joined by Andrea Wulf and Dr Paul Warde to discuss issues from environmental history. Helen Castor meets up with Professor Tom Williamson in south Norfolk to hear how our understanding of what makes a wood 'ancient' is changing - and why it matters. Conservationist Graham White is in Dunbar, the home of John Muir - the father of American conservation. Paul Warde discusses his work on the history of sustainability and Andrea Wulf previews her up-coming biography of Alexander von Humboldt. Producer: Nick Patrick A Pier production for BBC Radio 4.