sustainable cities are cities that implement sustainable public policies, which respect and preserve the environment.
The great concentration of the world's population in cities and the growing impact on the environment, has been awakening more and more, the awareness of companies and governments to establish sustainable measures that result in better quality of life for their population.
Sustainable cities take steps to prevent misuse of urban property, land management, building or excessive or inappropriate use in in relation to urban infrastructure, the installation of projects or activities that can function as traffic generating poles, the deterioration of areas urbanized; pollution and environmental degradation.
Another concern of sustainable cities is to make the population use efficiently and without wasting water, energy, and always using renewable materials. Some ideas to facilitate and improve the climate on the planet is to create multipurpose spaces to avoid waste, put all in the same neighborhood and encourage alternative transport, to reduce pollution on the planet and improve the ecosystem worldwide.
See also the meaning of environmental sustainability.