![]() ![]() Looking east from a location southwest of Ireland, an astronaut took this nighttime panorama of population centers in Ireland and the United Kingdom. But what about humanity’s signature footprint-cities? By day, cities viewed from space can blend into the countryside, or appear as gray smudges, depending on the style of development and size of the urban area. They include the regular patterns of irrigated cropland, straight lines of roads and railways running across continents, reservoirs on river systems, and the cement rectangles of ports and seawalls along coastlines. To an observer in space, humanity’s footprints on the surface of the Earth are large and varied. At the time of publication, it represented the best available science. ![]() This page contains archived content and is no longer being updated.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |