The intensely high temperatures at the core of the earth originated from vast masses of hot substances collapsing during the formation of the planet. Since then the heat has continued to be emitted due to radioactive decay of atoms making up the earth below. This earth-sized nuclear-reactor will likely continue to produce heat for millions and millions of years still to come, which makes it a renewable resource.

Steam produced when water contacts heated rocks, is replaced through precipitation. For this reason it is also a renewable resource. The production of electricity using this super hot steam is a method that will decrease the incidence of acid rain down to a mere three percent. These are far better percentages than the usual ways to generate power.

In the steam, some environmentally damaging chemicals, like sulfur (IV) oxide, can be found. Either they are returned to the well or they are made into chemicals that are used for other purposes. To get this energy, no fossil burning machinery is needed, which means that it is clean, releasing negligible greenhouse gases. This fact means that it is more desirable than the traditional methods available.

The stations that are geared for using the power in steam from below the earth, are smaller, and have less impact on the environment than the sites where combustion is essential. There are no pipelines that bring fossil fuel for the purpose of running pumps etc. Since the steam ascends without mechanical intervention.No foreign countries need be depended on for any part of this type of energy source, as the steam created by the hot temperatures, is potentially available locally in every place.

Making use of the wealth of energy stored underneath the surface can be problematic. This is because only sites that have hydrothermal wells close to the surface are cost-effective. Thus areas like Hawaii and Alaska and a few others are currently suitable. This means it cannot be exploited on a wide scale.

It is risky for companies to want to set up power generating sites in areas that have the pressurized steam available, as these areas are historically unstable, prone to both volcanoes and earthquake activity. Also, when drilling into the wells below the earth, there are no guarantees that the site will provide enough steam. They can also run dry, needing pipes to then be put into different positions to tap into other pockets near by.

The key to being able to introduce geothermal energy usage on a wider geographical scale is limited by the advancements in drilling technology. The reason for this is that the heat and corrosive elements associated with this type of drilling requires special equipment. This equipment is hugely expensive at present.