I say to the establishment of a new airport or through-traffic distribution being directed to other airports, it is moving noise. Also, communities tend to grow up close to airports because they are an economic driver and people will want to be close to that because that is where the jobs are.
Time and again, building new airports may seem like the solution, but in the long term you tend to end up with communities, development, moving closer to the airport. It takes very careful planning to make that a successful solution.