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<p>wells are used to tap <a href="page.php?w=geothermal_energy">geothermal energy</a> in hot, porous rock formations below the surface by injecting fluids into the ground, which is heated in the ground, then extracted from adjacent wells as fluid, steam, or a combination of both. The heated steam and fluid can then be utilized <a href="page.php?w=geothermal_power">to generate electricity</a> or directly for <a href="page.php?w=geothermal_heating">geothermal heating</a>.</p>

<p><big>Regulatory requirements</big></p>
<p>In the United States, injection well</p><p>
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