"Geothermal energy is heat that is generated within the Earth. (Geo means “earth,” and thermal means “heat” in Greek.) It is a renewable resource that can be harvested for human use."
https://education.nationalgeographic.org/resource/geothermal-energy
"Geothermal energy is heat derived below the earth’s surface which can be harnessed to generate clean, renewable energy. This vital, clean energy resource supplies renewable power around the clock and emits little or no greenhouse gases -- all while requiring a small environmental footprint to develop."
https://www.energy.gov/eere/geothermal/geothermal
"geothermal energy, form of energy conversion in which heat energy from within Earth is captured and harnessed for cooking, bathing, space heating, electrical power generation, and other uses."
https://www.britannica.com/science/geothermal-energy
"geothermal energy is considered one of the most efficient and sustainable types of energy because it’s a clean, reliable, and renewable resource. Geothermal energy uses the heat stored inside the earth’s surface to generate electricity and provide geothermal heating and cooling for homes and businesses. Geothermal resources have been in use in North America for more than 10,000 years, as American Paleo-Indians used geothermal hot springs for warmth, cooking, and bathing.
Geography plays a critical role in a region’s ability to take advantage of geothermal energy."
https://www.microsoft.com/en-us/sustainability/learn/what-is-geothermal-energy
"Renewable resource: It is both plentiful and completely free. Because heat emanates from the planet steadily, this resource will never run out and has no upper limit on its usefulness, at least for the next four billion years. The pace of energy extraction may be brought into equilibrium with the rate at which the heat of the geothermal power plant is being refilled if the pool is managed correctly."
"Geothermal energy, in contrast to conventional fuels, cannot readily move from one location to another. As soon as the energy is harnessed, it can only be utilised effectively in close places. In addition, because of the transmission, there is a possibility that harmful substances may be discharged into the environment."
https://www.turito.com/blog/physics/geothermal-energy
"the earth below the frostline is a steady 55 degrees Fahrenheit all year long."
https://dandelionenergy.com/geothermal-cooling