According to the FAA, sound mitigation is currently required to a 45dBa level under certain conditions, such as school soundproofing projects. With a 65DNL, Daley's Commission could basically stop all soundproofing projects that are located beyond four or five miles of O'Hare. News Flash Look for an article that includes ARCO in the December issue of Redbook. Dr. Callum Thomas explained that the airport industry faced more environmental pressures that would continue to influence future development of airports around the world. This could force all travel between major cities in Europe being made by High Speed Rail and not aircraft.
Environment is seen as the key to future development.
Even though demand for air travel increases, people have a lower tolerance of noise and pollution. Some European airports had to close at night, with many facing restrictions on operations. While European nations already support tougher standards, the US is calling for further study. State and local regulators will have to place further restrictions on other industries as a result of additional flights not being controlled. Airlines and airports are left unchecked when it comes to emitting toxins and hazardous emissions.