The German Pavilion at EXPO 2015 hosted a discussion about urban development. The main speakers, including Prof. Dr. Klaus Töpfer, former Minister of the Environment in Germany, and Reiner Nagel, Director of Bundesstiftung Baukultur, particularly discussed in their speeches how the renewed environmental awareness, along with the current demographic challenges, point at the creation of new green infrastructure as a major condition for a sustainable urban future.
https://www.transforming-cities.de/welche-potentiale-haben-gruenflaechen-in-der-stadt/