Desertification threatens nearly one quarter of the land surface of the globe.  The environmental impacts of desertification include a reduction in crop yields, a loss of plants, and an encroachment of the desert upon agricultural lands.  It is due mainly to climate variability and unsustainable human land management practices.  One current example of desertification is the spreading of the Gobi desert in Mongolia as a result of climate change and over-grazing which causes sand storms well into the interior of China.  A past example of desertification was the so-called “dust bowl” which affected the American Midwest in the 1930’s.


~ by americanpresidents on February 23, 2010.

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