11 Reasons the UN Should Make Cities the Focus of Its Forthcoming Sustainable Development Goals

Cities stand at the very center of each and every one of the biggest challenges the world now faces. 


The Amazing Endurance of Slums

Despite major advances, the world's slum population will likely double to 2 billion by 2050.

A Day in the Life of a Baltimore Slumlord Hunter

A video follows Carol Ott, a mother of two who is documenting every blighted property she can find in Baltimore.


How Keeping Track of Slumlords Became One Baltimore Woman's Full-Time Job

Carol Ott spends her days publicly shaming bad property owners, despite hate mail and death threats.


Faces of a Madrid Slum Clearance

34 Roma people have been removed from their makeshift homes outside Spain's capital.


Rio's Santa Marta Slum Attracts a Slew of Famous Visitors

Add Vice President Joe Biden to a list that includes Ed Helms, Bradley Cooper, and Michael Jackson.

Kaid Benfield

A Second Life for Some of Baltimore's Vacant Properties

The city has about 16,000 empty buildings, and it's developed a unique program to rehab a small number of them.


The Potential Perils of Rapid-Fire Urbanization

Former Barcelona mayor Joan Clos warns that a lack of urban planning could turn our expanding cities into powder kegs.


Can Floating Architecture Save This Nigerian Slum?

Architects NLE are putting the finishing touches on a three-story, 2,300-square-foot floating school for 100 students in Lagos.


China Expert: China Is Fast Approaching Urban Disaster

"We're creating a huge urban underclass of people who can’t function in the society."


UNICEF Wants Us to Talk About Urban Inequality

An online forum invites insight from the people who work on the ground in the world’s biggest and most dysfunctional cities.

A 70-Year-Old Documentary About Cities Shows We Haven't Come Very Far

The walkable, bikable suburb of the "future" looks an awful lot like the smart growth ideas of today.


Why Are Londoners Building Slums in Their Backyards?

Quasi-legal buildings are popping up for rent all over the city, and officials are doing little to regulate these Dickensian dwellings.


Demolitions Return to Waterfront Lagos Slum

Stilted homes over the water are being taken down by the government, leaving thousands homeless.


A Community Demolished With Just 5 Days Warning

An upgrading effort in Kenya's slum leaves thousands homeless


Unconventional Public Transit Project of the Day

An urban escalator opens in hilly Medellin slum


The Challenge of Replacing Organized Crime with Governance

Governments are struggling to move into gang-dominated slums in the cities of Latin America


In Africa, Building a Better Slum

A sustainable development expert on how African cities should handle the continent's urbanization boom


Brazil's Population Is Now Majority Minority

Preliminary results from 2010 census shows the mixed-race and black population has tipped the scale at the same time the country's cities saw remarkably high growth rates