Geothermal energy is limited by geological conditions.

Geothermal energy is limited by geological conditions.

• A. True
• B. False
• C. It is always available everywhere
• D. It only works at night

Answer: (A)

Geothermal energy relies on heat stored underground, so where you can actually use it depends on the geology beneath the surface. You need regions where the rock is hot enough at a practical depth and where fluids can flow to carry that heat to a surface plant. That usually means a good combination of a high heat source near the surface, permeable rock or a workable reservoir, and feasible drilling costs. In many parts of the world the heat is either too deep, the rocks are too impermeable, or the reservoir isn’t sufficient to sustain production, so geothermal power isn’t practically available there. Because of these geological factors, geothermal energy is not universally available everywhere, and its usefulness isn’t tied to day or night—it can provide steady power wherever the underground conditions allow.

Geothermal energy relies on heat stored underground, so where you can actually use it depends on the geology beneath the surface. You need regions where the rock is hot enough at a practical depth and where fluids can flow to carry that heat to a surface plant. That usually means a good combination of a high heat source near the surface, permeable rock or a workable reservoir, and feasible drilling costs. In many parts of the world the heat is either too deep, the rocks are too impermeable, or the reservoir isn’t sufficient to sustain production, so geothermal power isn’t practically available there. Because of these geological factors, geothermal energy is not universally available everywhere, and its usefulness isn’t tied to day or night—it can provide steady power wherever the underground conditions allow.