Professor Andrew Balmford, Professor of Conservation Science at the University of Cambridge, delivers a public lecture at Madingley Hall on 8 October 2012.

The lecture is chaired by Brian Eversham, Chief Executive of the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire, and introduced by Dr Rebecca Lingwood, Director of Continuing Education at Cambridge.

Please note that the lecture proper begins at the 04:09 minute point in the video.