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A drilling rig for use at a later stage of the closed-loop geothermal system under construction near Geretsried, Germany, Feb. 6, 2026. The project in the foothills of the Alps uses a new geothermal technology that circulates its own water, through wells or loops around three miles deep, and brings heat from contact with underground rocks up to to the surface. (Roderick Aichinger/The New York Times/Fotoarena)
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