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Geothermal

Deep geothermal power, minewater and ground heat, from Cornwall's first plant to the science of the Earth's internal heat.

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Geothermal energy: heat from the Earth, explained

How geothermal energy works, from deep power plants to minewater heat, and where the UK stands in 2026: United Downs, Eden Project, costs and risks.

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Dramatic Icelandic geothermal landscape with steam rising against a rugged mountainous backdrop.

Explainers

A mesmerizing view of a steaming geyser in Iceland, showcasing nature's geothermal beauty.

The history of geothermal energy: from Roman baths to deep power plants

No one invented geothermal energy. It is natural heat stored beneath the Earth's surface, coming partly from the slow breakdown of radioactive particles in…

Key terms

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Mine water heat: Low-carbon heat taken from water in flooded former coal mines, usually boosted by heat pumps and supplied to buildings through a heat network.

Calculators

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Gas meter units to kWh

Turn a gas meter reading (m³ or ft³) or therms into kilowatt-hours and pounds, using the official UK formula.

Latest geothermal news

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