Did you know that about 3.7 million people worldwide died in 2012 from diseases related to ambient air pollution? That is nearly the population of the city of Los Angeles expiring every year from…

Paula Caballero |

  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 |

Every minute, dozens of people in East Asia move from the countryside to the city. The massive population shift is creating some of the world’s biggest mega-cities including Tokyo, Shanghai,…

Axel van Trotsenburg |