Norway is poised to enact one of the most comprehensive bans in Europe on junk food marketing that targets children and teenagers, following a related push by the United Kingdom and smaller bids elsewhere – but just how far it will go will be decided in the coming weeks. The Nordic country’s food manufacturers and suppliers have voluntarily restricted such marketing to children under 13 since 2013, but the new plan would make it mandatory. The rule would fully ban advertisements for junk food like candy, ice cream, and sodas, and rely on “nutrient thresholds” to identify the unhealthiest offer…