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PBS NewsHour anchor in a green suit stands at the desk while a large screen behind shows red-toned graphics and the caption 'Seeing Red'. PBS NewsHour anchor in a green suit stands at the desk while a large screen behind shows red-toned graphics and the caption 'Seeing Red'.

International Dark Sky Week: Cities Dim the Lights to Protect Nocturnal Ecosystems

International Dark Sky Week highlights global efforts to reduce light pollution, with cities testing new lighting solutions to protect nocturnal wildlife and restore natural night environments.

A global honoring of the night sky sparks new conversations about light pollution, wildlife protection, and how cities can rethink the way we illuminate our world.

PBS NewsHour anchor in a green suit stands at the desk while a large screen behind shows red-toned graphics and the caption 'Seeing Red'.
Cities worldwide dim lights for International Dark Sky Week to protect nocturnal ecosystems. Image Credit: PBS NewsHour / Malcolm Brabant

Did You Know? It’s International Dark Sky Week, a worldwide celebration dedicated to honoring the night — and a call to rethink how much artificial light we pour into our skies. The movement urges communities to reduce unnecessary lighting, cut pollution, and restore the natural darkness that wildlife and humans both depend on.

Nature Edit

A compact side edit for a story where city design meets the nighttime lives most people never see.

Dark-Sky Cities

Lower glare, lighter footprint

The energy here is practical but quietly radical. Smarter light, softer impact, and the kind of urban tweak that can change an ecosystem after dark without shouting about it.

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Across the globe, cities and local governments are stepping up. Some are dimming streetlights. Others are switching to warmer tones. Many are hosting awareness events to help residents understand why the night matters — and how over‑illumination disrupts ecosystems, migratory patterns, circadian rhythms, and even human health.

Close-up of a man speaking in red lighting, with a lower-left caption reading 'MALCOLM BRABANT, Special Correspondent' and PBS NewsHour logo nearby.

PBS NewsHour’s Malcolm Brabant, reporting from Denmark, digs into how European cities are experimenting with new lighting strategies. From red‑toned streetlights to motion‑sensitive illumination, these innovations aim to protect nocturnal species while still keeping communities safe.

It’s a reminder that the night sky isn’t just beautiful — it’s essential.

Dig out the full PBS report below.

Watch: PBS NewsHour on International Dark Sky Week


Join the chat. Should more cities adopt wildlife‑friendly lighting?

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