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Jonathon Porritt in conversation with Andy Fryers

The World Wildlife Fund at 50

Hay Festival 2011, 
The WWF ambassador examines the evolution of conservation. What have we learnt, and how do we address the challenges facing us for a sustainable future where people and nature thrive?
 
Read more by and about Jonathon Porritt www.guardian.co.uk/profile/jonathonporritt