The city, in recent years, has undergone many changes, some of which are positive and some are negative. Larger, multi-ethnic, more dangerous; but also more shared, more challenging, more creative. It is therefore also changed the quality of living the city in terms of problems and resources. The text addresses the issue through some key concepts that outline the individual components of the new urban metabolisms.
Keywords: Urban metabolism, urban renewal, greening, reuse, densification, suburbs.