Geothermal power: Climate smart but seldom used

Geysers magnificently show the power of subterranean heat

By
Deutsche Welle
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The geothermal energy that exists beneath our feet is a tremendous pool of easily available energy that we should take advantage of. 

Geysers are a spectacular demonstration of the power of subsurface heat. However, this environmentally-favourable energy source is underutilised. Why? And is it potentially dangerous? DW explains.