CNN
Summary
Scientists and engineers near the English city of Oxford have set a nuclear fusion energy record, they announced Thursday, bringing the clean, futuristic power source another step closer to reality.
Using the Joint European Torus (JET) — a huge, donut-shaped machine known as a tokamak — the scientists sustained a record 69 megajoules of fusion energy for five seconds, using just 0.2 milligrams of fuel. That’s enough to power roughly 12,000 households for the same amount of time.
Nuclear fusion is the same process that powers the sun and other stars, and is widely seen as the holy grail of clean energy. Experts have worked for decades to master the highly complex process on Earth, and if they do, fusion could generate enormous amounts of energy with tiny inputs of fuel and emit zero planet-warming carbon in the process.
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