Flight fight over Grand Canyon noise pollution

 作者:贺兰霏     |      日期:2019-03-08 06:03:02
YOU might think the depths of the Grand Canyon would be a place of restful quiet. But with well over 100 helicopter and light-plane flights passing low overhead every day, calm is often in short supply. Now the Sierra Club, a US environmental organisation, is calling on Congress to end a two-decade fight over the Arizona landmark’s airspace and to curb the flights. The issue was meant to be resolved by a 1987 act that required the Federal Aviation Administration (FAA) and other agencies to restore quiet to the canyon,