Norway is to enforce a strict minimum age limit on social media of 15 as the government ramped up its campaign against tech companies it says are “pitted against small children’s brains”.The Norwegian prime minister, Jonas Gahr Støre, conceded it would be “an uphill battle” but said politicians must intervene to protect children from the “power of the algorithms”.Social media platforms, the Labour leader said, were being misused by the industry and could make users “single-minded and pacified”.T...