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John Connell goes fishing in northern Spain, home to one of the oldest populations of Atlantic salmon in the world.
But he discovers a world on an ecological edge - with water at dangerously low levels, distraught fishermen and virtually no fish.
'What is a fish without a river?' he asks. 'Indeed what is a river without a fish?'
Producer: Adele Armstrong\\nSound: Neil Churchill\\nProduction Coordinator: Iona Hammond\\nEditor: Richard Fenton-Smith
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