With less than one month to go before the official opening of Milan Expo 2015, almost nine million tickets have already been sold and organizers say the event is set to shine. The food-themed universal exposition runs from May 1 through October 31 with a record 53 single-nation pavilions, along with nine clusters representing about 90 countries and theme-based pavilions. About 140 countries in all will participate in Milan Expo 2015, under the theme: Feeding the Planet, Energy for Life. Some 20 million visitors are expected to join in on events that are based on promoting a sustainable global food system and fighting hunger. All these visitors will support the bioeconomy. Why?