Night sky when man-made light sources are made obsolete. Would the night sky still be affected by light-pollution?

Im creating a world where for whatever reason all power on Earth is gone. Meaning there is no more man-made light. Which also means no more light pollution. Would the night sky revert to its former glory before light pollution? Or would the night sky remain the same as it is currently?

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Night sky when man-made light sources are made obsolete. Would the night sky still be affected by light-pollution?

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