ABSTRACT
Renewable sources of electricity are generating increasing interest and having a corresponding impact on the energy scene. Geothermal energy sources have the advantage of providing base-load electricity, i.e., independent of daily, seasonal or climatic variations and thus can complement other, intermittently producing renewable sources like wind or solar. Whereas wind and solar energy sources are abundant on the surface, for geothermal sources one has to go deep, usually a few kilometers. In the following, geothermal electricity is addressed and the global electricity supply from various renewable sources will be presented and compared. The growth rate in renewable power generation is a decisive factor on the electricity market.
