Five eminent thinkers speak from around the world on different aspects of the complex theme of sustainable development. At the end of the series the lecturers will come together for a final round-table discussion hosted by the Prince of Wales. Presented by Kate Adie.

Chief executive of BP-Amoco Sir John Browne examines the challenges faced in a world where demands are increasing and resources are limited. The lecture focuses on examples of positive change which have been and are being delivered. But while business can and should offer new choices, the power of decision lies with individuals and governments. From the Dynamic Earth Centre in Edinburgh.

(Repeated Saturday 10.15pm)
The lectures are published on: [web address removed]