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Storing Energy By Heating Stones To 600 Degrees — Could Power Denmark For Hours

On Monday, the Danish minister of education and research, Tommy Ahlers, attended the official inauguration of a giant pilot facility that will use 600 degree hot stones to store energy. Speaking to dr.dk, he said: “This could be the missing link in our renewable energy transformation.” (It’s arguable whether there really is a missing link, but that’s another story.)