In December 2022, fusion researchers achieved a major accomplishment: more energy resulted from a controlled fusion reaction than was put into it. Allan explains why this is more a symbolic milestone than a sign that commercial fusion is imminent. Allan describes the current state of the art in fusion research, and the many ways fusion differs from fission, the existing nuclear energy technology. Fusion is moving from science to engineering, and many technical hurdles must be overcome before fusion, for all its promise, can make a significant practical difference in the world. 

For more information, visit the Fusion Energy Council of Canada, ITER, or the Fusion Industry Association. 

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