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 |

[[tweetable]]How fast is your city growing? The answer may depend on where you live.[[/tweetable]] There are the booming megacities such as Tokyo, Mumbai, and Nairobi. Then there are cities that…

Ede Ijjasz-Vasquez, Paula Restrepo Cadavid |

Eugenia enjoying a music lesson together with preschool children in the Bulgarian village of Litakovo. (Photo: Daniel Lekov / World Bank)
In Bulgaria, where just 15 percent of Roma children…

Daphna Berman |

Watch Video I was in Vietnam last month and I was so impressed by the tremendous progress the country has made compared to what I had seen 17 years earlier. In 2000, the Nhieu Loc–Thi Nghe canal…

Kristalina Georgieva |

Those who have tried toilet training a pet dog or cat know that it is a difficult proposition. How about toilet training a flock of 30 chickens? “Why would I want to?” Because in poor countries,…

Derek Headey |

Most of us in the development community are aware that proper water and sanitation services are crucial for life and health. Proper sanitation especially can decrease the instances and spread of…

Jaehyang So |

Image credit: CPI at Flickr under a Creative Commons license.

Claudia Gabarain |