Abstract: Global warming and environmental degradation is a major problem facing our planet. The burning of fossil fuels emits a large amount of carbon dioxide into the atmosphere. The greenhouse gases emitted into the atmosphere causes depletion in the ozone layer resulting in global warming. There are various sources of alternative energy; these include Solar Power, Nuclear Power, Hydroelectric Energy, Wave Energy, Biofuels, Natural Gas, Geothermal Power, Wind Energy, Biomass Energy, Tidal Energy. Geothermal energy is the energy contained in the interior of the earth crust and is enormous among the various renewable energy sources. Geothermal energy is known to be one of the clean energy without smoke and adverse environmental hazard; it stands a major distinction among others due to its availability regardless of the time of the day. Most developed countries have started harnessing geothermal energy as alternative source of energy for heating buildings, direct use and electricity generation. The United State has the highest global electricity generation from geothermal energy making up to about 28% of the global geothermal energy generation. Geothermal Energy made up about one third of the national generation for countries like Philippine and Iceland while Kenya has geothermal electricity generation of about half of its national electricity generation. Inspite of its advantage, geothermal energy has its disadvantages as well but could not be compared to the use of fossil fuel and other alternative source of energy.

Keywords: Geothermal Energy, Alternative Energy, Renewable Energy, Electricity generation

| DOI: 10.17148/IARJSET.2022.9630