We know energy transition is needed to achieve our climate goals - 1.5˚ or some increasingly dire impacts are on the table. We know the transition is technically possible, economically affordable, and pragmatically doable. We know the policies needed to get the transition done. We know the opponents of transition and how to win against them. Despite all that we know, there are a lot of unanswered questions about the feasibility of energy transition from a historical and empirical perspective. Can the transition happen fast enough? For each fuel source? In every country? Our guest in this episode, Dr. Jessica Jewell of the Center for Climate and Energy Transformations at the University of Bergen in Norway, has done extensive research on the feasibility of energy transition. She is also closely involved with the climate scenarios that have been used in the IPCC modeling and is exceptionally well-qualified to help us understand the feasibility question. We discuss research she has co-authored on the speed of solar, wind and nuclear adoption, as well as the speed of phasing out fossil fuels to see if those things are happening quickly enough to limit warming to 1.5°C. We’ll also ask whether the scenario modeling that has been done to date is really what is needed to get a handle on these questions, and how to improve it.