Reuters: Germany will stick to a more ambitious goal of cutting greenhouse gas emissions by 40 percent by 2020 even though the U.N. climate conference in Copenhagen fell short of expectations, a government adviser said on Monday. Hans Joachim Schellnhuber, head of the Potsdam Institute for Climate Impact Research, said it was unclear if the European Union as a whole would pursue a 30 percent target when it submits its plan to the U.N. Climate Change Secretariat by January 31. Germany …