PLANETOBSERVER / SCIENCE PHOTO LIBRARY PLANETOBSERVER / SCIENCE PHOTO LIBRARY
Urbanisation in a town in Chengdu, China, satellite image. An image from 1992 (upper right) is joined to one from 2000 (lower left) to demonstrate the spread of the town. In the 2000 image, more roads and buildings can be seen. China experienced rapid emigration from the countryside to towns and cities towards the end of the 20th century.
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