By Adèle Charbonneau
Climate change is forcing cities around the world to rethink transportation. Indeed, cities across the Global South are increas...
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By 2050, seven out of every 10 people living on Earth will call themselves an urbanite. So how will we navigate the throng?
In the summer of 2011, photographer Alejandro Cartagena spent three mornings a week -- any more and his wife would have kicked him out -- hunched over the railing of a pedestrian footbridge crossing one of Monterrey, Mexico's busiest highways.
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