Seeing Saudi Arabia go green
3 of 15 from 40 years of watching Earth from orbit (pictures)
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Landsat images from the past 25 years demonstrate how Saudi Arabia has turned its arid lands green through tapping underground aquifers. Healthy vegetation appears bright green while dry vegetation appears orange. Barren soil is a dark pink, and urban areas, like the town of Tubarjal at the top of each image, have a purple hue.
July 23, 2012 4:00 AM PDT
Photo by: NASA/GSFC
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