As the world becomes increasingly urbanized, the number of megacities is growing rapidly. Today there are 37 cities worldwide with populations of greater than 10 million, and 84 with populations…

Philip E. Karp, Peter Ellis, Barjor Mehta |

The buzz around satellite imagery over the past few years has grown increasingly loud. Google Earth, drones, and microsatellites have grabbed headlines and slashed price tags. Urban planners are…

Sarah Elizabeth Antos, Nancy Lozano Gracia, Ana I. Aguilera |

In the previous blog, we discussed how remote sensing techniques could be used to map and inform policymaking in secondary cities, with a practical application in 10 Central American cities. In…

Sarah Elizabeth Antos, Nancy Lozano Gracia, Ana I. Aguilera |

Also available in: Français | Español | العربية The premise behind the Sustainable Cities photo competition was simple. [[tweetable]]We wanted to learn what people around the world “see” when they…

Xueman Wang, Dini Djalal |

When a river swells beyond its usual patterns, the impact on its surroundings can be devastating. In 2014, 51 people lost their lives and over 20% of Serbia’s population were affected by floods…

Zuzana Stanton-Geddes, Brendan Chia |

[[tweetable]]When it comes to responding to disasters, time is of the essence.[[/tweetable]] Help needs to come immediately to save lives; recovery and reconstruction have to start swiftly to…

Zuzana Stanton-Geddes, Jolanta Kryspin-Watson |

Photo: Victoria Ojea / World Bank Invited to think of Buenos Aires, most would probably think of elegant cafés, beautiful architecture, passionate football fans, and buzzing streets. Invited to…

Ede Ijjasz-Vasquez, Jesko Hentschel |

Why the world’s cities are at risk – and what we can do to make them more resilient We may not know exactly what the world will look like in two decades, but we know this: it is going to be a…

Ivo Germann, Ede Ijjasz-Vasquez |