This roadmap is a product of collaborative effort between Heriot-Watt University and the non-governmental organization RMI. We thank the following advisory board members who played a critical role in shapping this roadmap: André Bardow, Niels Berghout, Alix Bouxin, Sara Budinis, Sabine Fuss, Howard Herzog, Dennis Jong, Aïcha El Khamlichi, Anu Khan, Frauke Kracke, Wilfried Maas, Tom Mikunda, Eli Mitchell-Larson, Berend Smit, and John Tuttle.