Geothermal energy – you’ve probably heard of it before. But do you know what it involves? Heat from the earth – or geothermal energy – is the heat stored within the Earth’s crust, or in rock, ground- or deep water, and is accessible to us all. Geothermal energy is a renewable energy source that can be used to heat, to cool, and to generate electricity. As it is freely available everywhere, it has the potential to provide large areas with regenerative heat, thus replacing non-renewable, high-emission energy sources – relieving the environment of an immense strain. In Obereggen, to name but one example, the Oberholz mountain hut is powered by geothermal energy.