An Expo brings the whole world together to find solutions to a fundamental challenge of humanity. This challenge is the theme of the Expo. In Milan 2015, the theme will be "Feeding the planet, energy for life" and Astana 2017 will be dedicated to "Future energy."
In practice, how is this theme adressed? First, all participants are either given an exhibition space or the opportunity to build a pavilion. In these spaces they can showcase their experience, innovations and ideas regarding the theme. In addition, conferences, workshops, debates as well as diplomatic and professional meetings are organized. This allows participants to exchange ideas, come up with solutions and develop new cooperation ties.
Thanks to this intellectual stimulation, Expos set guidelines for the future. For example, Expo 2010 Shanghai, dedicated to improving quality of life in cities, issued the "Shanghai Manual - A Guide for Sustainable urban development in the 21st Century". In 2012, Expo Yeosu gave way to the "Yeosu Declaration for a living ocean and coasts" to encourage the International Commmunity to take action.