Geothermal energy is the heat in the earth. There is a natural source of energy beneath the surface of the earth for centuries. The word comes from the Greek words geo and thermal. Geothermal energy is a renewable energy source, as it constantly generates heat in the earth. Far below us there are water pools heated by magma (or melted rocks). These water tanks are our geothermal tanks. People use geothermal energy for bathing, heating buildings and generating electricity.
With water from hot springs, geothermal energy has been used for swimming since the Palaeolithic era and for space heating since ancient Roman times combined with underfloor heating circuits. The slow decay of radioactive particles in the core of the earth, a process which occurs in all rocks, produces geothermal energy. It comes from the original formation of the planet (20%) and the radioactive decay of materials (80%). Scientists have found that the temperature of the interior of the earth is about 5.9282 degrees Celsius, which is as warm as its surface sun. Temperatures in the mantle range from 200 C, at the upper boundary with the earth’s crust to about 4,000 C at the boundary of the mantle-core.
The bark of the earth is broken down into pieces called tectonic slabs. The magma approaches the surface of the earth, near the edges of these plates, where many volcanoes occur. The lava that explodes from the volcanoes is partly magma. Rocks and water absorb heat from the magma. The rocks and water found deeper in the subsoil have the highest temperatures. Although the air temperatures above the ground change throughout the day and with the seasons, the Earth’s temperatures 3-5 meters below the ground is stable between 10-15 C. For most areas of the earth, this means that soil temperatures are usually warmer than air in the winter and cooler than wind in the summer. Today, 90 countries use geothermal energy. For some,