Solar is nice and all - it's is cleaner than fossil fuels, but requires a bunch of inputs. Geothermal really needs to be pushed for more; after the initial investment, requires basically no inputs and has no toxic byproducts or disposal problems.

"The full technical potential of next-generation geothermal systems to generate electricity is second only to solar PV among renewable technologies and sufficient to meet global electricity demand 140-times over."

https://www.iea.org/reports/the-future-of-geothermal-energy/...