In this issue:
"Street Savvy": Meeting the biggest challenge starts with the city.
"The Social Nexus": The best way to harness a city’s potential for creativity and innovation.
"Global Bazaar": Today’s street markets and shantytowns are forging the world’s urban future.
"Castles in the Air": Why building skyscrapers makes sense on many levels.
"How Green Is My City": Why retrofitting is the best way to clean up urban living.
©2011 Scientific American