Geographer Duncan Smith mapped the predicted trajectory of worldwide urban growth from 1950 through 2030. Concentric circles of different shades show where and when growth was (or will be) the most dramatic.
Census results released last week offered some astonishing findings - each of England's big cities is growing, after shedding people only a decade ago. The Economist looks at the phenomenon and the factors that have contributed to the resurgence.
<p>Author Alan Ehrenhalt says that conditions are ripe for the permanent return of downtown residential neighborhoods, and that a "demographic inversion" has already begun in Manhattan, Chicago and Washington, DC, among other cities.</p>