Why has Nigeria banned export of shea nuts?

Nigeria has banned for six months exports of shea nuts used for beauty products to help boost the local economyMore about Malawi's health boat that provides a lifeline for locals on a remote islandAnd we find out why African made prom dresses are a hit among American teenagersPresenter: 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.