?Desertification is a fancy word for land that is turning to desert,? begins Allan Savory in this quietly powerful talk. And terrifyingly, it’s happening to about two-thirds of the world?s grasslands, accelerating climate change and causing traditional grazing societies to descend into social chaos. 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.