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 |

A remarkable thing happened at the US Treasury in DC today; the United States, Canada, Spain, South Korea and the Bill and Melinda Gates Foundation agreed to pool resources, and as Bill Gates…

Fionna Douglas |