![]() The Natural Sounds and Night Skies division of the National Park Service works to protect acoustical environments, but first it helps to know where the ruckus is worst. And all that racket can harm wildlife (and people, too!) by inducing stress, altering behavior, and drowning out the natural communication networks of an ecosystem. With planes soaring overhead, trains rumbling below, and electricity and cars humming just about everywhere, silence-or the lack of the human din, at least-is hard to come by these days. ![]()
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