Sir David Attenborough on global warming

Sir David Attenborough's new series Frozen Planet looks at life at the North and South Poles.

Sir David says he is back on screen in the seven-part series to express his "personal view" on the effects of global warming.

Frozen Planet starts on 26 October at 21:00 BST on BBC One

Richard Bacon broadcasts Monday to Thursday 14:00 to 1600 on BBC Radio 5 live.

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