I saw the great Bill McKibben speak when he was in Sydney earlier this year, and he delighted us with a visit to GreenUps to talk about 350.org.
Here is a new interview on Treehugger radio.
They are a fantastic series of interviews, and I like to download them and listen them as I walk around the park.
Some other great ones are by Emily Pilloton on Project H, Edward Humes on Eco Barons, Adam Werbach from Saatchi and Saatchi S, Paul Watson - a modern pirate who is saving our seas, Daniel Goleman author of Emotional Intelligence, the people behind the amazing story of Crude ... the list goes on. Great listening and learning.