Sent to live on a remote island in the Tanzanian half of Lake Victoria, Mark Weston finds a community grappling with one of the world's great unknown environmental crises.

Mark Weston has written about and broadcast on Africa for BBC Radio 4, Slate, the Royal African Society, South Africa's Mail & Guardian, and Roads & Kingdoms. He is the author of the West Africa travelogue The Ringtone and the Drum and the satirical novel African Beauty, and his research on global issues has been published in some of the world's leading academic journals. He lives in London, UK.