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Keeping warm in the winter isn't easy in Finland, one of Europe's coldest countries. But in one Finnish town, residents are kept toasty warm thanks to cheap, efficient and renewable heat stored in a so-called "sand battery". Our France 2 colleagues report.
By FRANCE 24 EnglishKeeping warm in the winter isn't easy in Finland, one of Europe's coldest countries. But in one Finnish town, residents are kept toasty warm thanks to cheap, efficient and renewable heat stored in a so-called "sand battery". Our France 2 colleagues report.

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