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#earthhour — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #earthhour, aggregated by home.social.

  1. 🌍 Vanavond is het alweer de 20ste editie van #WWF #EarthHour! 🌏

    De dag waarin wij met zijn allen stil staan bij hoe kostbaar onze aarde is. Doe jij ook mee? Zet dan tussen 20:30 uur en 21:30 uur al je lichten uit! 💡❌ -> 🕯✅

    Samen geven we zo een krachtig signaal af: de #natuur op onze #aarde is van onschatbare waarde. Dus laten we er goed voor zorgen. #Natuurlijk 🌿💚

    #earthhour #lightsoff #savetheplanet #noplanb #pvddalkmaar #alkmaar #pvdd #partijvoordedieren #partijvddieren #planbvooralkmaar

  2. “Using photometric and spectroscopic sensors, we observed up to 50% night sky darkening during Earth Hour from 2011 to 2024 in Hong Kong, primarily as a result of a small but critical number of lights-out instances in central business districts, as evidenced by crowd-sourced photography records. The emission reductions mostly occurred in the 445–500, 500–540, and 615–650 nm spectral ranges---corresponding to peak emissions from LED billboard screens--- and in the 585–595 nm range, associated with metal halide floodlights used for facades and billboards. Our study identifies these sources as major contributors to urban light pollution.”

    (Note: not yet peer reviewed, but the authors are legit.)

    researchsquare.com/article/rs-

    #LightPollution #Cities #LED #DarkSkies #EarthHour #Lighting #OutdoorLighting