The modern city is the very symbol of modernization: an engine for economic modernization: an engine for economic growth; a ready market for goods, growth, services, and labor; opportunity for social services and labor; opportunity for social mobility, cultural boiling pot; a bastion of political power. Cities are also the highest consumers of non consumers of non-renewable resources, and the highest polluters of the natural and the highest polluters of the natural environment. It promotes walking and discourages driving, it promotes walking and discourages driving, that:  good for enhances community feelings, good for health, discourages crimes, creates interaction. Lively downtowns are filled not only with office buildings and shopping malls but also with and shopping malls and also with apartments where people live. The Focus of policy, research, and thinking on the role of cities as engines of growth. Empowerment of city government in public service delivery and financial matters. Development of city centers for dense mixed-use, Places for cultural and educational activities Places for cultural and educational activities.