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"If we really want a fully renewable energy supply, we need fusion as a third pillar," Laukien said, referencing solar and wind development. "Fusion is the key to a decarbonized future."

There could be serious benefits from a device that can generate the same energy from a single gram of fuel as 11 tons of dirty coal, as proponents have suggested, all without planet-warming carbon pollution.

With an eye on a clean-energy future, both the United States and Japan announced a partnership to fund further development and commercialization of fusion. Various innovations in the field have been announced, including one that doesn't rely on the usual magnets and lasers.

Realta Fusion CEO Kieran Furlong shared a statement on fusion's promise, per the report: "Today's demonstration puts the compact magnetic mirror firmly back in the race towards commercial fusion energy. It's a giant leap forward for a concept that promises economically viable, zero-carbon heat and electricity.