It's nuclear fission. It's always been nuclear fission (well, at least since the '50s) and it will continue to be until we commercialize fusion reactors. Everything else is nice to have but it's like NIH syndrome.
replies(6):
Geothermal is a great fit for dispatchable power to replace coal and fossil gas today (where able); batteries are almost cheaper than the cost to ship them, but geothermal would also help solve for seasonal deltas in demand vs supply ("diurnal storage").
https://reneweconomy.com.au/it-took-68-years-for-the-world-t...
https://ember-energy.org/data/2030-global-renewable-target-t...
I also love geothermal for district heating in latitudes that call for it; flooded legacy mines appear to be a potential solution for that use case.
Flooded UK coalmines could provide low-carbon cheap heat 'for generations' - https://news.ycombinator.com/item?id=45860049 - November 2025
https://particulier.edf.fr/content/dam/2-Actifs/Documents/Of...