The urban concentrations are grouped around administrative centers.

It has contributed throughout the world to the destabilization of rural society and to the growth of vast urban concentrations.

Electoral demographics had changed since 1949 and Labor now drew most of its support from urban concentrations of workers.

Located at the north of the city, actually with more than 50.000 inhabitants, the biggest urban concentration of the capital of Alava.

Reykjavík is not mentioned in any medieval sources except as a regular farm land but the 18th century saw the beginning of urban concentration there.

In Virginia, the Greater Richmond metropolitan area is the largest urban concentration.

The Government is working to disperse new industries around the country and to avoid the urban concentrations that have brought problems elsewhere in Asia.

This includes, but is not limited to, westernized diet, greater urban concentrations of women, and later child bearing.

Los Angeles combines suburban scale with urban concentration; its style is the apotheosis of the regional mall.

Additional health benefits can be gained by reducing urban concentrations of NO2 and SO2.