US Technology Helps Improve Crop Yields in Drought-Stricken Africa 

More frequent and severe droughts in Africa are hampering food production, especially in arid parts of the continent where farmers struggle to eke out a living. A water retention system developed in the U.S. is helping African farmers fight the trend and improve crop yields in drought-affected areas. Juma Majanga reports from Kibwezi, Kenya.  
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