Reuters: The European Union said on Tuesday a U.S. pledge to propose an emissions target at U.N climate change talks in Copenhagen in December could improve the chances of success at the meeting. But the 27-country bloc’s senior environment official also said there could be delays in putting the pledge into law and cautioned that the Copenhagen talks would be a failure if there was no agreement on funding. A senior U.S. official said on Monday U.S. negotiators would propose an emissions …