Vattenfall, SSAB and LKAB are building a rock cavern storage facility in a coastal city in northern Sweden. The 100-cubic-meter facility will be built 30 meters below ground and will begin storing green hydrogen next year.
German energy provider EWE wants to set up a test cavern with a capacity of 500 cubic meters at a depth of 1,000 meters. It is scheduled to go into operation in spring 2022.
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