Today's show comes "live" from Tate Modern, where Ken Livingstone, Jeremy Hardy, Hugh Fearnley-Whittingstall, Sara Cox and Michael Rosen are among those telling us why they're supporting the 10:10 campaign to reduce carbon emissions by 10% by the end of 2010.
We hear from the filmmaker Franny Armstrong, who had the idea of 10:10, and the Guardian's deputy editor Ian Katz on why we're supporting the campaign.
Julian Glover, the Guardian's chief leader writer, has the details of today's Guardian/ICM poll on climate change, while Patrick Barkham reports from Greenland, where the battle against global warming is most acute.
In other news, Luke Harding reports from Moscow on an international row over the causes of the second world war.
And business reporter Nick Mathiason explains why the Cayman Islands are on the verge of going bust.
