The continuous growth of urban population has recently given rise to the emergence of a new model which responds better to the challenges of natural resource depletion as well as waste management. This model has been called the „circular economy“. Conference Topics are: Infrastructure and eco-architecture, Landscape and planning, City heritage and its regeneration, Green urban areas, Urban transport, Communications, Water reuse, Air contamination, Noise pollution, Waste water systems, Coastal cities, Recreation in the city, Socio-economic issues Law and regulation, Production of goods and services, Consumption issues, Urban agriculture, New design practices, Smart technologies and Safety aspects.