The WHO has classified diesel exhaust as a Class 1 carcinogen, alongside cigarette smoke and asbestos. Image by SpecialKRB via Flickr.
EMBARQ Brazil leads journalists on a tour of BRT systems, including Metrobus in Mexico City. Photo by Mariana Gil / EMBARQ Brazil.
Do the findings of this study make you think twice about crossing the street in an affluent neighborhood? Photo by Norris Wong.
How would you react if you heard these announcements on the platform? Photo by Susan Sermoneta.
This might be the only place In New York City where you can run barefoot on grass in the middle of February. Photo by Karen Blumberg.
Boulder, Colo. is the U.S. metropolitan area with the happiest residents, according to a 2010 Gallup and Healthways survey. Photo by Shihmei Barger.
Rio de Janeiro unveiled the first station of its forthcoming bus rapid transit system, which conntects Barra da Tijuca (pictured above) to other city neighborhoods. Photo by Rodrigo Soldon.
Mobile real-time transit information leads to decreases in bus stop wait time by almost 20 percent. Photo by Oran Viriyincy.
Medellin transformed violence and despair into hope and opportunity, using sustainable transport as one of the key levers to drive change, explained Holger Dalkmann. Photo courtesy of Carlos Felipe Pardo.