PLANETOBSERVER / SCIENCE PHOTO LIBRARY PLANETOBSERVER / SCIENCE PHOTO LIBRARY
The Americas, satellite image. Oceans are blue and land is green and brown. City lights (yellow) in dark areas show areas of dense population, particularly on the coast of South America (lower right). The centre of South America is sparsely populated and so has fewer lights. Image obtained using data from Landsat 5 and Landsat 7 satellites.
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