Near-surface geothermal energy could cover a large portion of our energy requirements. Nevertheless, this regenerative energy source is not used optimally. In order to change that, scientists in the EU project GRETA (Geothermal REsources in the Territory of the Alpine space), led by the Technical University of Munich (TUM), have mapped the potential of near-surface geothermal energy in the Alpine region and have formulated guidelines for its use.An invisible wealth of regenerative energy is concealed beneath the ground we walk on: geothermal energy. Inside the earth temperatures range up to several thousand degrees centigrade. And even if the temperature drops towards the earth's surface, there is still enough warmth to be used efficiently. At depths of up to 400 meters, experts refer to near-surface geothermal energy.
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