What makes a city? A major UN conference on housing and sustainable urban development is taking place in Quito, Ecuador, this week. DW takes a look at the key elements cities need to function and how they can strive to be more sustainable.
Expanding urban populace
The number of people living in cities is growing rapidly. According to the UN, over two-thirds of the global population will live in urban areas by 2050. For cities, that means meeting a booming demand for infrastructure and services – like affordable housing, water, sanitation, employment, schooling, health facilities and transport.