Denmark’s government on Friday announced an agreement to ban access to social media for anyone under 15, ratcheting up pressure on Big Tech platforms as concerns grow that kids are getting too swept up in a digitized world of harmful content and commercial interests.

The move would give some parents — after a specific assessment — the right to let their children access social media from age 13. It wasn’t immediately clear how such a ban would be enforced: Many tech platforms already restrict pre-teens from signing up. Officials and experts say such restrictions don’t always work.

Such a measure would be among the most sweeping steps yet by a European Union government to limit use of social media among teens and younger children, which has drawn concerns in many parts of an increasingly o

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