Cities increasingly require and use natural resources and energy to sustain daily life and activities of the urban population. Their impacts are felt across the globe. But cities can also be designed and changed in ways to offer opportunities to reduce resource needs and environmental impacts. (Fuente: EEA) Additional information Urban sustainability issues — What is a resource-efficient city? (Fuente: EEA) Urban sustainability issues — Resource-efficient cities: good practice (Fuente: EEA) Urban sustainability issues — Enabling resource-efficient cities (Fuente: EEA)