Light Pollution, Taken by Nasa at National Geographic
Luminous patches glow on a map of nighttime Earth created from satellite and ground data on scattered light as of 1996-97. The situation is even worse today. Based on calculations, two-thirds of humanity lives under skies polluted with light, and one-fifth can no longer see the Milky Way. Least affected? The Central African Republic.
(Source: stoilz, via wonderous-world)