I wonder what affects we might have when cooling the earth (ground). Smacks of the same sort of hubris that we couldn't possibly warm the earth. I guess conservation of energy is a hard concept to comprehend.
So if we switched to 100% geothermal (a few orders of magnitude more than we're actually discussing using), we'd be using on the order of a hundred trillionth of the energy per year?
[0] https://physics.stackexchange.com/questions/51920/amount-of-...
[1] https://ourworldindata.org/energy-production-consumption
Not only that, but Earth's internal heat is being renewed constantly via things like radioactive isotopes and tidal forces.
Radioactivity and tidal forces create a fixed amount a heat and that heat dissipates at a given rate, right? So what happens if we change that rate of dissipation/extraction?
The point is, it's all handwavy. Seems familiar to just about everything we've done before - fossil fuels, plastics, PFAS...
The biggest concerns are specific techniques for pumping water, which (sometimes) can cause small earthquakes.
One day humans will realize that their existence and energy use will always have an environmental impact.