IN THIS week’s Babbage, Alok Jha, our science correspondent, investigates a technology that could solve all of the world’s energy problems in a stroke—nuclear fusion. From Iter, the world's largest collaborative fusion experiment, to private start-ups, he talks to the organisations racing to be first to create fusion power. Could the long-promised dream of nuclear fusion—to provide clean, limitless, carbon-free energy—finally be about to come true? Runtime: 20 min

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