NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Yellow River valley. Satellite image showing the extent of urban development surrounding China's Yellow River, also known as Huang He (dark line running from bottom left to upper right). North is at top. Red indicates vegetation, blue indicates water and beige indicates bare ground. Huange He stretches almost 5,5000 kilometres from eastern Tibet to the Bo Hai sea. Image data obtained in May 1979 using the Multispectral Scanner on NASA's Landsat 3 satellite. To view how this region looked in 2000, see image C003/6349.
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