In this week's programme, Bill Bryson, author and president of the Campaign to Protect Rural England, talks about his campaign to stop fly tippers and litter bugs blighting Britain's streets.
Germany's wind power chief, MP Hermann Scheer, tells us how to create an energy industry based on renewables.
And we hear from the UN's top climate change official, Dr Rajendra Pachauri. In an exclusive full-length interview with the Guardian, Pachauri warns that until rich countries take serious action to tackle global warming, the developing world will be unwilling to sign up to a post-Kyoto climate change deal.
Joining Alison Benjamin in the studio are John Vidal, the Guardian's environment editor, and Leo Hickman, the paper's ethical living editor, to discuss biofuels, the UN food crisis report, and Japan's plan to unlock methane gases locked under the sea.
