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Geothermal sources, especially where temperature is high enough for the production of electricity, often release some carbon dioxide. When estimating the GHG emissions from a geothermal power plant, we must however, take the entire life-cycle of a geothermal power plant is taken into account to value correctly its climate impact. When comparing geothermal and conventional fossil fuel-based energy sources, it releases only 1/20th of the GHG gasses per energy unit produced (often stated in kilowatt-hours, kWh). In terms of emission it puts geothermal power plants on pair with solar energy, when it comes to climate impact. Ergo, geothermal has very low impact on the climate.