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Story summary
- NASA released global nighttime-light maps (60°S-70°N) tracking illumination from 2014 to 2022.
- The data reveal a 34 percent rise in global radiance, with dimming offsetting 18 percent.
- Brightening peaked in China and northern India, while U.S. West Coast cities brightened and much of the East Coast dimmed after LED retrofits.
- European nights fell sharply in 2022, with France, the United Kingdom and the Netherlands dropping 33 percent, 22 percent and 21 percent.
