One of the outstanding features of urban settlement is the concentration of cities on river terraces, notably along the Yangtze River.
The fact that Democrats fought off Republican efforts to break up the new district's concentration of cities, which happens to favor Democrats, also bodes well for Mr. Maloney, Mr. Sullivan said.
There is also a concentration of cities with relatively low social vulnerability in the South region (green areas).
The new importance of northwestern Europe in terms of overall population and concentration of large cities reflects in part the "Atlantic revolution," the redirection of trade routes brought about by the great geographic discoveries.
Indeed, despite the terrorist attack and the subsequent concentration of the city's leaders and police force on possible future threats last year, the city managed to hold its own in many key areas, and even improve some services.
News of the city's plans to revitalize the street, which has New York's highest concentration of vacant, city-owned buildings, has brought out feelings of skepticism and betrayal for many of the former residents -- some of whom still remain so close as a group that they hold 148th Street reunions twice a year.
City officials say children expected to enter foster care in the Bronx, which has a high concentration of the city's abused and neglected children, will be placed in their neighborhoods starting in January.
The schools were designed as clusters of separate buildings, "like a concentration of a city," according to Washington Fajardo, president of the Rio World Heritage Institute.
LAC also has the largest concentration of mega-cities in the world.
The potential concentration of inner-city living in smaller apartments as opposed to larger houses in the suburbs is, therefore, a potential driver of long-term downwards pressure on energy consumption in these sectors.
The area also has a high concentration of the city's major media firms, such as the Chicago Tribune newspaper, and advertising agencies.
