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2 answers

Nutrient depletion, runoff, erosion.

2007-05-03 14:06:10 · answer #1 · answered by Catspaw 6 · 0 0

Drought. The Sahara desert moves southward several feet per year because of mismanagement of the soil.

2007-05-03 21:09:00 · answer #2 · answered by TychaBrahe 7 · 0 0

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