0% of global electricity is generated from Geothermal

Geothermal energy harnesses the heat stored beneath the Earth's surface to produce electricity and provide direct heating solutions. This sustainable and clean energy source arises from the Earth's internal heat, which is generated from the original formation of the planet and the radioactive decay of minerals over time. The temperature difference between the Earth's core and its surface drives the gradual movement of heat towards the surface, which can be captured and utilized for various applications. Geothermal energy is available across the world, although its potential varies depending on the geological characteristics of the region, with areas possessing high tectonic activity being particularly rich in geothermal resources.

The process of generating electricity from geothermal energy involves several key components. Generally, geothermal power plants are sited in regions with significant geothermal activity, such as volcanic areas or tectonic plate boundaries. These plants use wells to access geothermal reservoirs below the Earth's surface, bringing hot water or steam to the surface. This steam is then used to turn turbines, which activates generators to produce electricity. After being used, the steam is often condensed back into water and reinjected into the ground to sustain the reservoir's pressure. There are several types of geothermal power plants including dry steam, flash steam, and binary cycle, each tailored to the temperature and pressure conditions of the geothermal resource available. This method of energy generation is exceptionally reliable, providing a steady base-load power output with a low carbon footprint.

One of the greatest advantages of geothermal energy is its low carbon intensity. With a carbon intensity of just 38 gCO2eq/kWh, it stands as a formidable clean energy source in the fight against climate change, especially when compared to traditional fossil fuels such as coal and oil, with carbon intensities of 820 gCO2eq/kWh and 650 gCO2eq/kWh, respectively. Low-carbon technologies like geothermal, along with solar (45 gCO2eq/kWh), wind (11 gCO2eq/kWh), and nuclear (12 gCO2eq/kWh), play a crucial role in reducing the carbon footprint of electricity generation globally and are essential for achieving sustainable energy goals.

Geothermal energy contributes significantly to the electricity grids of certain countries and states, showcasing its potential as a clean energy source. Globally, it accounts for approximately 0.48% of all electricity consumed, which may seem modest but represents a solid foundation for further expansion. Countries such as Iceland and New Zealand are leading examples, with geothermal contributing to 27% and 20% of their electricity needs, respectively. Within the United States, geothermal power is a key component of the energy mix in places like Nevada and California, where it provides about 8% and 4% of their electricity supply. Costa Rica also benefits, with 12% of its electricity generated from geothermal sources. These examples highlight the capacity for geothermal energy to significantly augment the electricity supply and help transition towards a cleaner, more sustainable energy future.

Overall, the adoption and expansion of low-carbon energy sources such as geothermal, along with wind, solar, and nuclear power, are paramount for reducing greenhouse gas emissions and averting the negative impacts of climate change. By expanding these technologies, we can support the increasing demand for electricity driven by global development and electrification initiatives, thereby fostering a sustainable and prosperous energy future. The need for investment in clean energy infrastructures is evident, and the integration of geothermal energy as part of a diverse energy portfolio underscores its potential to deliver reliable, eco-friendly electricity for generations to come.