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15 cards from this deck
Loss of fertility and productive capacity
99.7%
10 million hectares
10-40 times faster
Transitional boundary between Sahara & Central Africa
5-10 kilometres per year southward
Uncontrolled spread of desert conditions into new areas
Doubled
Tripled
Growing same crop repeatedly on same land
Over 500,000 acres
30 times faster
Overgrazing, overcropping, deforestation
4-5 months (May-October)
Up to 3%
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