Cities going dark
Every year, light pollution increases—by as much as 10 percent, according to one study.
While individual changes to home lights can help local wildlife, communities working together
can have the biggest impact.
“Lighting decisions are made by millions of people,” says Kyba. “To make real progress you have
to get all those people on board.”
Some communities are showing what those social changes might look like. The entire island
country of New Zealand is currently working to meet light pollution standards; and the Pacific
island country of Niue was the first country to become a certified International Dark Sky
Sanctuary in 2020.
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In 2019, France imposed a new law setting strict limits for how and when light shines at night.
In the U.S., the National Audubon Society’s Lights Out program encourages cities from San
Francisco to New York to reduce their nighttime lights during periods when migratory birds are
passing through. Dimming bright city lights for as little as 30 minutes can prevent fatal bird
collisions, according to a 2017 study.
If advocating for policy changes feels daunting, start small, says Kyba.
“When a light is bothering you or you think it's a problem, it’s worth complaining,” he says.
“Often, there are very simple fixes that don’t cost very much money and can basically solve
the problem.”
Source: www.nationalgeographic.com
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