In this week's programme, John Sauven, executive director of Greenpeace, explains why the environmental group holds Unilever responsible for the destruction of Indonesian rainforests and the killing of endangered orang-utans.
Leading landscape artist, Kurt Jackson, talks about his paintings of the Wicken Fen nature reserve in Cambridgeshire which is under threat from rising sea levels, and why he's donating his latest exhibition to Friends of the Earth.
Finally, we hear from Tracey Smith about International Downshifting Week, her campaign to get people to "slow down and green up".
Joining me in the studio are John Vidal, the Guardian's environment editor, and Bibi van der Zee, the paper's ethical living editor, to discuss the end of biofuels, the mystery of Britain's disappearing birds, and the rise and rise of greenwash.
