Climate policy makers must come up with a new global target to cap temperature gains because the current goal is no longer feasible, according to a German study.The study jars with the aim of United Nations negotiations, which have focused on reducing emissions quickly enough to prevent the worst effects of climate change. That ambition was thrown into doubt in May when scientific data showed carbon dioxide in the air passed a level not seen for millions of years. UN analysis shows current targets won’t keep temperature gains to 2 degrees. European Union leaders will have to develop “clear ideas” on a way forward because the temperature goal, pushed mainly by the 27-member bloc, has failed to trigger successful policies, according to the Berlin-based institute, which advises Chancellor Angela Merkel’s government. “The EU will not be able to avoid this question much longer,” Geden said. The study recommends that world leaders either allow the 2-degree goal to become a benchmark that can be temporarily overshot, accept a higher target, or give up on such an objective altogether.