Many Californians will be spending summer traveling to their favorite getaway spot. Some of the most popular tourist destinations are national parks. But we can love them just a little too much. Too many hikers crowd trails, exhaust from automobiles clouds park air, and as Craig Miller reports, we can also have a big impact on one of the most treasured aspects of a park, its sound.

Soundscapes of National Parks 15 December,2011QUEST Staff

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