Env Issues - DESERTIFICATION (6)

Env Issues - DESERTIFICATION (6) - Desertification VI....

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Desertification Geography 12 Environmental Issues | Page 10 VI. DESERTIFICATION What is desertification? Land degradation (soil erosion, waterlogging, salinization, land use change) in arid, semi-arid and dry sub-humid areas resulting from various factors, including climatic variations and human activities. Linear dunes in the Sahara Desert Image of Sahelian mother and child What causes desertification? It is caused primarily by human activities and climatic variations: population growth: populations are increasing as fast in arid lands as elsewhere overcultivation, overgrazing, deforestation, poor irrigation People takes too much from the soil and puts too little back
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Desertification Geography 12 Environmental Issues | Page 11 Why is desertification a problem? Desertification is a problem because: one-third of the earth’s land is arid or semi-arid overall land degradation of various sorts is estimated to be causing an annual loss of 12 million
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This note was uploaded on 01/23/2012 for the course GEOGRAPHY 12 taught by Professor Staff during the Fall '08 term at Concordia AB.

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Env Issues - DESERTIFICATION (6) - Desertification VI....

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