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Τετάρτη, 11 Νοεμβρίου 2009

Dry Wadi Fills with Life


-->> http://earthobservatory.nasa.gov/IOTD/view.php?id=41016&src=eoa-iotd
With the majority of its land area lying within the Sahara Desert, dry, dusty Niger is one of the hottest countries on Earth. Only the southernmost regions of the country receive enough reliable precipitation to support agriculture or livestock grazing. In the north, rock outcrops and sand dunes predominate, although sporadic precipitation sometimes allows drought-adapted plants to grow in favorable locations, such as this wadi in northern Niger, not far from the Algerian border.

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