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How does geothermal energy work?

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Quick answer

Geothermal energy works by tapping the heat stored inside the Earth. Wells bring up hot water or steam from deep underground, which spins turbines to make electricity or heats buildings directly — a clean, always-available energy source. It uses natural heat from deep inside the Earth.

Step by step

  1. It uses natural heat from deep inside the Earth.
  2. Wells bring hot water or steam to the surface.
  3. The steam spins turbines to generate electricity.
  4. It's renewable and available day and night.

People also ask

How does geothermal energy work?
It taps underground heat — hot water or steam spins turbines for electricity or warms buildings directly.
Is geothermal energy renewable?
Yes — the Earth's heat is effectively limitless on human timescales and continuously replenished.
Where does geothermal energy work best?
In volcanically active regions where heat is close to the surface, though it can be used more widely too.

Part of the guide: Energy & Electricity at Home →