Although the United Nations recognizes the benefits of urban development, such as the possibility of new forms of social inclusion, it also warns of some imbalances.
Inequality and exclusion abound in large cities, often at rates higher than the national average, at the expense of sustainable development that works for all.
In the opinion of the agency, it is important to plan the city to prepare the orderly expansion of the city to guide the investments, prepare the subdivisions of the land, and install the basic infrastructure before the construction.
Reconditioning improvised areas is complicated and expensive, experts warn.
Responding to urban population growth seems to lead to a long process of building capacity to harmonize goals and work together effectively, or a tendency to respond to urgency through infrastructure development without regard to first.
Because of this, the UN is calling for financing a sustainable urban future for all.
At the same time, it also encourages cities to change and experiment and to learn from each other to facilitate this transition, for example, through initiatives such as the so-called “twin cities” or city networks.
Statistics confirm the uneven population balance between rural and urban areas.
As of 2009, more people lived outside cities than in them; however, currently, about 55 percent of the world’s population lives in towns and cities, and the level of urbanization is expected to be almost 70 percent by 2050.
Much of this population growth will occur in Asia and Africa, particularly in China, India, and Nigeria, where fertility rates remain high.