Yes, ground source/loop is considered geothermal.
The problem is that you need to a dig up a large area of possible natural vegetation to do it.
The problem is that you need to a dig up a large area of possible natural vegetation to do it.
That said, my residential options for energy are rich. I have the Chesapeake Bay 80ft from my current heat pump. So I could theoretically implement a plethora of heat exchange mechanisms taking advantage of that. Wind power is feasible except for the footprint. Yesterdays 35kt gust may have been a bit much tho. Have waves that could power things also. And mostly unobstructed roof which could host solar. Tidal range is not very large, and current is greatly reduced near shore.