Milan is hosting a universal exhibition called Expo 2015 from May 1 through October 31. It's an occasional world fair where nations convene for a theme-based event, and t his year’s concept is “ Feeding the Planet , Energy for Life". The Fertile Crescent , bridging ancient Mesopotamia and present-day Egypt, is where Sumerians, and later Mesopotamians, domesticated many of the wild plants which now form the basis of global food production. Arab Gulf states, grappling with water scarcity and harsh growing climates, are world leaders in innovative irrigation and ...