Bloomberg: EU carbon-dioxide permits fell to a three-week low as a “huge overhang’ of allowances damped demand while their premium over United Nations offsets widened. EU allowances for December dropped 36 cents, or 2.3 percent to 15.02 euros a metric ton as of 4:55 p.m. on London’s European Climate Exchange. That’s the sixth day of declines and the lowest intraday level since Sept. 24. “There is a huge overhang’ of EU allowances that might last until the end of the decade, said Alan …