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Detailed explanation-1: -Nuclear fusion breakthrough a milestone for the future of clean energy, US officials say. US Department of Energy officials announced a history-making accomplishment in nuclear fusion Tuesday: For the first time, US scientists produced more energy from fusion than the laser energy they used to power the experiment.

Detailed explanation-2: -United States has announced a nuclear fusion breakthrough, a historic step towards the promise of ‘near-limitless’ clean energy and may help the fight to curb climate change.

Detailed explanation-3: -Last month the National Ignition Facility at the Lawrence Livermore National Laboratory (LLNL) in California announced a significant breakthrough in nuclear fusion research.

Detailed explanation-4: -Detailed Solution The correct answer is the United Kingdom. Scientists in the United Kingdom said they have achieved a new milestone in producing nuclear fusion energy or imitating the way energy is produced in the Sun.

Detailed explanation-5: -In a laboratory, for the first time, the world’s largest lasers forced atoms of hydrogen to fuse together in the same kind of energy producing reaction that fires the sun. It lasted less than a billionth of a second.