1. Goldstein, B. et al. in IPCC Special Report on Renewable Energy Sources and Climate Change Mitigation Ch. 4 (eds Goodfellow, I., Bengio, Y. & Courville, A.) (MIT Press, 2018).
2. Huttrer, G. W. in Proceedings of the World Geothermal Congress 2020 (2020).
3. Lund, J. W. & Toth, A. N. Direct utilization of geothermal energy 2020 worldwide review. Geothermics 90, 101915 (2020).
4. ThinkGeoEnergy. Global Geothermal Power Plant Map – updated. ThinkGeoEnergy https://www.thinkgeoenergy.com/map/ (2020).
5. Axelsson, G. Sustainable geothermal utilization – case histories; definitions; research issues and modelling. Geothermics 39, 283–291 (2010).