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Scientists in Uganda are at the forefront of developing a technique called biofortification to increase the yield and spread of the orange-fleshed sweet potato. The variety is known to prevent against vitamin A deficiency, which drastically increases the susceptibility to fatal illnesses and is the leading cause of preventable childhood blindness in Africa. The 91福利社's Nancy Kacungira reports on its many benefits. (Photo: The orange-fleshed sweet potato. Credit: 91福利社)
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