Maybe I should have mentioned that geothermal is a great sustainable and renewable source of energy (wiki)

Also, I’m a bit confused with the source you linked because it is about geoengineering which I believe is a terrible approach (see links bellow) but this site kinda presents geothermal as part of it. Geothermal energy production is not related to geoengineering/climate engineering, in any way.

• Geoengineering Monitor | Key reasons to oppose geoengineering
• Center for International Environmental law | Why Geoengineering is a False Solution to the Climate Crisis