A worker shows a micro cocoa plant at the Zambakro Nestle Experimental Station in Yamoussoukro December 11, 2013. Ivory Coast achieved record cocoa output in 2011, topping 1.5 million tonnes of beans, but many industry experts predict a gradual drop in production across West Africa as trees age and yields fall. Nestle, the world's biggest food group, said it will also grow 27 million coffee plants to help to revive the West African nation's coffee sector, which suffered falling output during a decade-long political crisis. Picture taken December 11, 2013. REUTERS/Thierry Gouegnon (IVORY COAST - Tags: AGRICULTURE BUSINESS)