>U.S. scientists have achieved “ignition” — a fusion reaction that produced more energy than it took to create...
>The inefficient lasers used in the experiment required about 300 megajoules of energy to fire just 2 megajoules of energy into the experiment. The reaction produced about 3 megajoules of energy...
A bit of a generous definition of 'produced more energy than it took to create' there.
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