When
November 8, 2012 11:27 am — 11:27 am
Where
Washington, DC
The catchphrase is "sustainable cities," densely populated regions that in theory can efficiently provide environmental and social services for the urban population of the world, which in 2008 became a majority of the human race, according to the U.N. Population Fund. By 2030, this number will swell to 5 billion people and many prognosticators foresee 70 percent of the world