Economy

Solving the Global Housing Crisis

Some 330 million urban households worldwide are financially stretched by housing costs.
Makeshift homes in Rio de Janerio's Nova Tuffy slum.Reuters/Pilar Olivares

The century of cities brings with it great promise, but also great problems. While some countries’ rapid urbanization has led to the creation of economic, cultural and political meccas, others have become slums.

The greatest wave of urbanization in world history is occurring during our lifetimes, which means that providing quality, affordable shelter for the billions of people streaming into global cities is among the most pressing challenges we face.