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Desertification is a fancy word for land that is turning to desert.  And it is happening to about two-thirds of the world's grasslands, accelerating climate change and causing traditional grazing societies to descend into social chaos.  Allan Savory has devoted his life to stopping it.  He now believes - and his work so far shows - that a surprising factor can protect grasslands and even reclaim degraded land that was once desert. Definition: sigmoid curve - an "S" shaped curve.

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