将下列段落翻译 With the increasing global energy demands in the future, geothermal energy usage is set to increase. There is potential for geothermal developments in many countries all over the world where geothermal resources are located. Geothermal energy is thermal energy generated and stored in the earth. Thermal energy is the energy that determines the temperature of matter. The geothermal energy of the earth’s crust originates from the original formation of the planet and from radioactive decay of materials ( in currently uncertain but possibly roughly equal proportions ) . The geothermal gradient, which is the difference in temperature between the core of the planet and its surface, drives a continuous conduction of thermal energy in the form of heat transfer in the core to the surface .