Desertification

Desertification,
April 20, 2011,
By Michael Evans,
Earth Times,

Desertification occurs in all continents except Antarctica and affects the livelihoods of millions of people by the reduction or loss of biological or economic productivity. Drylands occupy 41% of the world's land area and in 2000 were the home to about 2 billion people, roughly a third of the human population.
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