The World Tonight - 15/10/2010

London Zoo special Ritula Shah chairs a debate from London Zoo asking what can be done to prevent the extinction of many forms of life on Earth - what's known as biodiversity. Next week United Nations member states meet in Nagoya, Japan, to review the progress - or rather the lack of it - in their commitments to prevent biodiversity loss. To explore the issues at stake we bring together leading experts with an invited audience at the BUGS House at London Zoo. On the panel Sir Jonathan Porrit, Forum for the Future Jonathan Baillie, the Zoological Society of London Chris Knight, PricewaterhouseCoopers Dr Kate Rawles, University of Cumbria.