00550nam 2200169z- 450 9910693891303321(CKB)4970000000016521(EXLCZ)99497000000001652120240129c2001uuuu -u- -engAviation and the environment : transition to quieter aircraft occurred as planned, but concerns about noise persistWashington, D.CAviation and the EnvironmentDOCUMENT9910693891303321Aviation and the environment3429822UNINA