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“It took the scientific community some time I think to realize that the scientific community is in a street fight with climate change deniers and they are not playing by the rules of engagemen

since 2006, when scientists at Denali began a decade-long effort to collect a month’s worth of acoustic data from more than 60 sites across the park — including a 14,000-foot-high spot on Mount McKinley — Betchkal and his colleagues have recorded only 36 complete days in which the sounds of an internal combustion engine of some sort were absent.

To restore ecosystems to acoustic health, researchers must determine, to the last raindrop, what compositions nature would play without us.

Noise can mask mating calls, cause stress and prevent animals from hearing alarms, the stirrings of prey and other useful survival cues. And as climate change prompts a shift in creatures’ migration schedules, circadian rhythms and preferred habitats — reshuffling the where and when of their calls — soundscapes are altered, too.

Though it has worked well enough to get us this far down evolution’s challenging road, our risk perception system, which blends thinking and feeling and mostly takes place subconsciously, often produces fears that fly in the face of the facts.  Many of us are more afraid of some risks — like mercury or pesticides or genetically modified food — than the evidence warrants. And many of us aren’t as concerned about some really dire dangers as we ought to be, like climate change, particulate pollution or acidification of the ocean  The problem is, being too afraid, or not afraid enough — a phenomenon I call “the perception gap” — produces dangers all by itself, For that reason, it’s worth exploring just why our fears don’t match the facts, as a first step toward protecting ourselves from the real dangers that arise when we get risk wrong.

We can avoid relying solely on the often-alarmist news media, or on friends who only reinforce how we already feel.