In this week's programme, Brian Paddick, the Lib Dem's mayoral candidate for London drops in to tells us why a vote for him is a "green" vote.
He joins me and John Vidal, the Guardian's environment editor, to discuss the London mayoral race and his plans to extend the tram network, provide free insulation to households on low incomes and abolish the western extension of the congestion charge. But would he ban bendy buses and who would get his second vote; Ken or Boris?
Also in the show, Martin Wainwright visits the Ormskirk Beekeeping Association to hear from environment minister, Lord Rooker, about plans to save Britain's honey bees.
Finally Ben Branwyn, in Totnes, Devon, tells us how your town could prepare for life after oil by joining the growing Transition Town network.
