Why has Nigeria banned export of shea nuts?

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Nigeria has banned for six months exports of shea nuts used for beauty products to help boost the local economy More about Malawi's health boat that provides a lifeline for locals on a remote island And we find out why African made prom dresses are a hit among American teenagers Presenter: Audrey Brown Producers: Makuochi Okafor and Ayuba Iliya in Lagos. Alfonso Daniels, Stefania Okereke and Yvette Twagriyamariya in London and Madina Maishanu in Abuja. Senior Producer: Paul Bakibinga Technical Producer: Francesca Dunne Editors: Maryam Abdalla, Andre Lombard and Alice Muthengi.