[VOA]Yaounde -Its 7am at the Yaounde city hall. The 2013 edition of the National Science and Innovation Expo has just opened. A man is making an announcement over the public address system. Government officials, scientists, and a curious public are all here to discover the work of the country’s top researchers. There is much to see: pest resistant cocoa, a beverage made from oil palm sap, solar panels, energy-saving stoves. There is even medicine made from roots and barks; and a locally manufactured brickmaking machine.
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