> Yes, the occasional home has geothermal The use of the word geothermal like that feels like a silly marketing thing to me. The "geothermal" you are referring

> Yes, the occasional home has geothermal The use of the word geothermal like that feels like a silly marketing thing to me. The "geothermal" you are referring to here, is just a ground source heat pump. A ground source heat pump is drawing heat from the ground, exploiting the huge (but not unlimited) thermal mass of the soil. That thermal mass is the same reason it has a stable temperature year round. Ground source heat pumps do not use geothermal energy, i.e. the 25–30 °C/km heat gradient of the Earth. AltaRock is actually trying to use geothermal energy. These are two very different concepts, so we should avoid conflating them, and use different words to refer to them.