An array of motorbikes crossing Long Bien Bridge on the Red River in Hanoi, Viet Nam
Half of the world’s population lives in urban environments. One billion people, one out of three urban dwellers, are living in slum conditions today. Providing them with better housing and education will be one of the great challenges facing a world of 7 billion people and counting.
Photo ID 490555. 29/06/2011. Hanoi, Viet Nam. UN Photo/Kibae Park. www.unmultimedia.org/photo/