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Nuclear fusion powers stars. Could it one day electrify Earth?
The elusive power source can’t save us from the need to cut emissions now. But a $20-billion reactor approaching completion in southern France could pave the way for the future.
Tim Luce, chief scientist of ITER, the giant experimental fusion reactor now under construction in southern France, stands in the pit that will house the donut-shaped "tokamak," in which hydrogen nuclei will be heated to hundreds of millions of degrees and fused into helium.
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