“The drive for efficient fixtures has come at the expense of a rapid increase in light pollution,” said Ruskin Hartley, executive director of the International Dark-Sky Assn.
AdvertisementEven species that stay put are forced to relocate their homes. A recent study led by Longcore found that, a threatened species of shorebird, look for safe roost sites in darker areas of Santa Monica Bay when mostly empty parking lots are illuminated with floodlights all night long.
Humans, too, are vulnerable to light pollution. Artificial light blocks the production of melatonin, a hormone that regulates sleep cycles, and disrupted sleep cycles have been linked to an array of health problems. The American Medical Assn.in 2016 that high-intensity, blue-rich LED lights were “associated with reduced sleep times, dissatisfaction with sleep quality, excessive sleepiness, impaired daytime functioning, and obesity.
The Milky Way can be seen in exquisite detail in the dark skies over Cedar Breaks National Monument in Utah.
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