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“It’s definitely attractive to be in America right now,” Emma Nehrenheim, Northvolt’s chief environmental officer, said in an interview last month in Vasteras.

The company develops manufacturing techniques at its complex in Vasteras.

That concern is the main reason some European leaders, including Germany’s second highest ranking official, Robert Habeck, have beaten a path to Vasteras, a city about 60 miles from Stockholm that is best known for a Viking burial mound and a Gothic cathedral.

During the Cold War the vast caverns beneath the Swedish city of ��ä���ٱ��å�� held a stockpile of oil totalling 300,000 cubic metres.

In the case of ��ä���ٱ��å��, warmth from the caverns will be sent via heat exchangers to a district heating network, which supplies 98% of the households in the city of 130,000 people.