The subject of the 2000 lecture series is the Respect for the Earth
This year's lectures are delivered by five different thinkers, each eminent in a different field. At the end of the run, the Prince of Wales presents his own views on the topic in a roundtable discussion with all five lecturers.
Jonathon Porritt explains how theories of sustainable development have become a key area for debate in academic circles, the environmental movement and the global political arena
