Reuters: Norway will rely on buying greenhouse gas quotas abroad to meet a self-imposed goal of curbing emissions by more than demanded by the UN’s Kyoto Protocol until 2012, researchers said on Tuesday. Norway, which says its targets for combating global warming are among the toughest in the world, says it will axe emissions by about nine percent below 1990 levels by 2012 — tougher than a Kyoto goal of a maximum one percent rise. But scientists at the Center for International …