The model of the sustainable city is based on 4 areas: compactness, complexity, efficiency and social cohesion

The current urban development model, based almost entirely on the consumption of resources, is clearly unsustainable. The rapid growth and expansions of urban systems, as well as increased resource consumption, pollution and waste, are the main elements that put pressure on the urban support systems that provide energy and materials to cities.

Today’s pattern of urbanization resembles a sprawling city, where the city’s main functions and features are located further and further apart. In the area of mobility, urban sprawl leads to an increase in harmful emissions, more areas exposed to unacceptable levels of noise, an increase in traffic accidents, and more work hours lost in travel. Urban sprawl also creates serious urban dysfunctions in terms of complexity (where built up space is mono-functional), efficiency (where resource consumption is unprecedentedly high), stability and social cohesion (where there is less diversity and income segregation).

In order to cope with urban sprawl, it is important to address the challenges of modern society, to introduce measures of sustainability and to encourage the growth of the information and knowledge society. The compact and diverse city is the best positioned model that allows the inner city to increase its design and complexity, and provides the basis for a socially cohesive and economically competitive platform. At the same time, the compact city minimizes land use, energy and material resources, and contributes to the preservation of agricultural and natural systems.


<<The urban model that best describes the principles of urban efficiency, habitability and sustainability, is the model of the compact city. This model encompasses the morphology, complex organization, efficient metabolism, and social cohesion desirable within today's cities. Moreover, it provides the basis of sustainable models for BCNecologia. >>