by Whitney Pipkin

World's fairs have long served as international display cases for innovation — show-stopping events that introduce us to architectural feats like the Eiffel Tower and culinary traditions like ice cream cones.

The next international exposition, 2015 Expo Milan, will take on one of the globe's most vexing questions: How do we feed a future of 9 billion people without destroying the planet itself? The expo, which runs from May through October, will bring together more than 140 countries to share possible solutions.

Read more

Source: http://www.washingtonpost.com/