Change on the Blackwater Estuary. As the sea level rises this unique landscape and its valuable biodiversity face destruction.
Different ways to save the Estuary, assessing which habitats to protect and which to let go.
Creating new salt-marsh has economic and environmental impact. Farmers, conservation workers and fishermen share their views.
What is biodiversity? Assessing the role of conservation in maintaining Britain's oldest nature reserve.
Experts analyse and compare habitats, identifying the 7,000 species that thrive at Wicken Fen.
Human impact on the Fen - a walk through the managed conservation areas.
The different threats conservationists face and the methods used to preserve biodiversity.
The geological history of the longest river in Britain, and its continuing transformation today.
Is the Severn changing again and what should we do about it? Identifying what causes floods.
Farmers and conservationists explain how we can change the way we use the land.
Creating more natural reservoirs and flood plains. Increasing biodiversity along the river's path.