I think you might be underestimating what it means to be fluent in a language. The most important criterion in my opinion is whether you are able to freely speak in that language without doing any on the fly translating.
Geothermal energy is thermal energy within the Earth due to the movement of the Earth's particles. Most of this geothermal energy is contained within the core of the Earth. This geothermal energy is renewable energy as it is energy derived from a natural resource and it can be replenished.
Renewable energy is generally defined as energy that comes from resources which are naturally replenished on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat.he heat that is used for geothermal energy can be from deep within the Earth, all the way down to Earth's core â 4,000 miles (6,400 km) down. At the core, temperatures may reach over 9,000 Â°F (5,000 Â°C). Heat conducts from the core to surrounding rock.