This nippy three-wheel was thought to have bitten the dust, but it's back.
Richard Douthwaite, writer and economist, is a co-founder of Feasta. He is the author of several books including The Growth Illusion and The Ecology of Money. He recently edited Before the Wells Run Dry - Ireland's Transition to Renewable Energy.
Phoebe Bright has 20 years of wide ranging experience as a business consultant, solving problems for companies such as The London Stock Exchange and Chase Manhattan Bank and starting a flying school. She has a particular interest in challenging businesses to identify risks and opportunities created by changing energy prices.