These state or local programs are becoming popular because they build connections between rural and urban residents in a divisive political climate.
How urban living can cap population growth and help conserve natural resources.
More than half of the people on the planet live in cities -- so it's more important than ever for countries to make a plan for sustainable growth.
While conversations will focus on many issues surrounding the rapid urbanization of our planet, none are as important as clearly defining a path that will lead us closer to a sustainable and equitable urban future.