U.S. GAO - Aviation and the Environment: Survey of Airport Officials on Airport Environmental Issues (GAO-10-748SP, September 2010), an E-supplement to GAO-10-50

19.	What factors or circumstances, if any, have helped your airport to reduce the effects of noise on surrounding communities?

20.	What factors or circumstances, if any, have hindered your airport from reducing the effects of noise on surrounding communities?

21.	How could the Federal Aviation Administration (FAA) or Congress better assist your airport to reduce the effects of noise on surrounding communities? Please consider the guidance provided by FAA, in addition to other aspects of FAA's role.