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Home The African Sahel, the region just south of the Sahara Desert, is a soil moisture hot spot. (Wikimedia Commons) The African Sahel, the region just south of the Sahara Desert, is a soil moisture hot spot. (Wikimedia Commons)

The African Sahel, the region just south of the Sahara Desert, is a soil moisture hot spot. (Wikimedia Commons)

The African Sahel, the region just south of the Sahara Desert, is a soil moisture hot spot. (Wikimedia Commons)

The African Sahel, the region just south of the Sahara Desert, is a soil moisture hot spot. (Wikimedia Commons)

The U.S. Midwest is a soil moisture hot spot. (Wikimedia Commons)