The difference between night and day is disappearing, scientists warn

The difference between night and day is disappearing, scientists warn  Washington Post Losing Darkness: Satellite Data Shows Global Light Pollution On the Rise  Space.com Earth Is Lit, And That's A Problem  NPR Light pollution: Night being lost in many countries  BBC News Home - Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences  GFZ PotsdamFull coverage

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