Geothermal drilling is a process used to access the Earth's internal heat by creating wells in geothermal reservoirs. These reservoirs contain hot water or steam, which can be harnessed for energy production or direct heating applications. The drilling involves specialized equipment to reach depths where temperatures are high enough to generate electricity or provide heating. The extracted geothermal energy is considered a renewable resource because it relies on the Earth's natural heat, which is continuously replenished. This method is increasingly used in various regions, particularly in areas with volcanic activity, such as the United States, Iceland, and New Zealand.