Light Pollution in the United States

Light pollution is human-made light (streetlights, advertising, building lighting) that disrupts ecosystems and has harmful health consequences. The eastern part of the U.S. has the highest level of light pollution. D.C. is the most light-polluted area of the nation, with higher than 200,000 times the artificial brightness of the U.S. darkest spot, the city of Yakutat in Alaska.

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