In Mali, residents of Timbuktu take part in the maintenance of the Djingareyber Mosque, a World Heritage Site, applying traditional repair techniques. (Tiecoura Ndaou / UN Photo) Imagine a city…

Sameh Wahba, Barbara Minguez Garcia |

  When we think of urban expansion in the 21st century, we often think of ‘sprawl’, a term that calls to mind low-density, car-oriented suburban growth, perhaps made up of single-family homes.…

Chandan Deuskar |