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Discovery
Nighttime Lights Clarify Economic Activity

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Image of nighttime lights visible on earth from outer space.

The use of nighttime lights visible on earth from outer space is one of the more innovative ways to measure social and economic activity in countries that have little or no reliable data collection programs.

Credit: Data courtesy Marc Imhoff of NASA GSFC and Christopher Elvidge of NOAA NGDC. Image by Craig Mayhew and Robert Simmon, NASA GSFC


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