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World Population / Light density (2007)

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Light density
World Population / Light density (2007)
Click on the image above to see the gradual shift from human made light density (November 2000, NASA) to population density (2004, Center for International Earth Science Information Network). With currently already half of the Earth’s population (approx. 3.35 milliard of people) living in highly human-populated urban areas, public lighting (lights from private homes, public buildings, street/waterway lights, advertising) will further increase: i.e. the city dwellers generally want/demand their public/private security enhanced by more street lights, more and more people work at night and most people allow (or haven’t thoight about) the existence of lighted public advertising (see my post on new trends in public advertising).