Abstract
Tourist attractions may become too popular. This is the fate of the Grand Canyon National Park (GCNP), where over-flights for “armchair” tourists are bringing increasing noise to what was once a place with only natural sounds. In an effort to bring the noise under control, the National Park Service has initiated a study to derive an evaluation methodology for air tour operations over the GCNP. A two zone system is being considered for impact assessment, leading to substantial restoration of natural quiet.
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