Reuters: Norway reaffirmed on Thursday a unilateral pledge to cut its greenhouse gas emissions by at least 30 percent by 2020 as part of international efforts to combat global warming. Environment Minister Erik Solheim also restated a policy announced in October that Oslo was willing to deepen the cuts to 40 percent below 1990 levels if other nations showed more ambition as part of an international agreement. “For now we will report in the 30 to 40 percent range,” he told a news …