The United Kingdom has taken a bold step into the Earth’s hidden energy. Near Redruth, Cornwall, the United Downs Deep Geothermal Power plant has started generating electricity by tapping superheated water 5 km below the surface, producing around 3 MW of clean, continuous power — enough to light up 10,000 homes 24/7. Unlike solar or wind, geothermal energy never sleeps; it’s always on, offering a stable backbone for a greener energy grid. This milestone proves that the planet’s internal heat can now be harnessed at scale, right in the heart of a former mining region.
The project doesn’t stop at electricity. From the mineral‑rich geothermal fluids, engineers are also extracting lithium, producing about 100 tonnes of battery-grade lithium carbonate per year — a critical resource for the clean energy transition. For Green Humans, this is more than technology; it’s a model of regenerative energy systems, where power, jobs, and innovation grow hand in hand with the planet’s natural processes. Cornwall is showing that tapping the Earth responsibly can fuel homes, economies, and a sustainable future. More