In his new book Chris looks at the remaining challenges for the energy transition. We know that we need to ‘electrify everything we can’ and that our power sources will be predominantly solar and wind. But what about the more intractable problems? Possible: Ways to Net Zero examines 18 different challenges, ranging from the cement industry or plastics through raw material shortages to issues such as capital shortages. In each short chapter Chris identifies a possible route and try to put a cost on it. The seminar will summarise the main conclusions.