Sustainable growth was the focus of the recent World Economic Forum annual meeting in Davos, but how realistic is this goal, and what would it look like? The idea of degrowth, as a counter to the status quo of aiming for exponential growth, has also been gaining popularity. Last year's IPCC report on mitigating climate change cited it for the first time, and the European Research Council has recently given NZ$15.5 million to degrowth academics to study 'post growth' policies. Professor Tim Jackson is a specialist in sustainable development at the University of Surrey, Director of the Centre for the Understanding of Sustainable Prosperity and on Air New Zealand's Sustainability Advisory Panel. His latest book is Post Growth - Life after Capitalism.