+A fumarole is a vent in the Earth's crust, often found near a [Volcano](/wiki/volcano), that emits steam and gases. These openings are direct evidence of subsurface [Geothermal](/wiki/geothermal) heat, releasing energy and chemical compounds from deep within the planet.
+## See also
+- [Hot Spring](/wiki/hot_spring)
+- [Geyser](/wiki/geyser)
+- [Vent](/wiki/vent)
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