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Human presence over Europe at night. Global map showing major road and rail networks over land, along with transmission line and underwater cable data superimposed over satellite images of cities illuminated at night. Europe is centre middle, northern Africa is bottom middle while India and eastern Russia is just visible at far right. This image illustrates modern human impact on the planet. (KEYSTONE/SCIENCE PHOTO LIBRARY/FELIX PHARAND-DESCHENES, GLOBAIA)