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 |

Stephon Gabriel was overjoyed when an email popped up in his inbox announcing he had won the World Bank's Voices4Climate competition. One of 19 winners from 14 countries, his music video…