The wish to protect wildlife is now a central goal for our society, but where did these ‘green’ ideas come from? And who created the cherished institutions, such as the National Trust or the Royal Society for the Protection of Birds, which are now so embedded in public life and attract millions of members? Cocker asks searching questions such as who owns the land and why? And who benefits from green policies? Why do the British seem to love their countryside more than almost any other nation, yet have come to live amid one of the most denatured landscapes on Earth? He tries to map out how this overcrowded island of ours could be a place fit not just for human occupants but also for its billions of wild citizens. Chaired by Andy Fryers.