Some people think "vertical" city is the best, where people live and work in tall buildings. Others think "horizontal" city is better, where there are few tall buildings. Discuss both these views and give your own opinion.

As urban populations grow, planners must decide whether cities should expand upward through towers or outward through lower-density neighbourhoods. I believe vertical cities are generally more sustainable, but they must include human-scale public spaces and should not become isolated forests of expensive apartments.