These before-and-after graphics show just how severe the problem has become.
Wild shots of window washers.
One-upmanship is probably to blame.
Obesity rates have skyrocketed in China over the last generation, at the same time that its cities have exploded. A group of researchers is now trying to pin down the relationship between the two.
Spray-painting walls in Beijing isn't actually all that dangerous. So why are there so few people doing it?
Also, L.A. outlaws plastic bags; Lady Gaga ponders violent threats in Jakarta; and much more.
After many setbacks, Rem Koolhaas's "reinvention of the skyscraper" is nearly ready to open.
Cycling has dropped precipitously in China's capital. Will it ever be popular again?
As iconic as anything above ground, these subway platforms leave riders with an added sense of the city they serve.
French photographers Lucie & Simon have cleansed major cities of their troublesome humanity, creating empty, dread-filled urban landscapes.
Better care is needed for rural-to-urban migrant workers, a new review concludes.
The best responses to this week's The Big Fix.
Beijing's street vendors are offering goldfish and small turtles sealed inside plastic trinkets for your amusement.
Four years after "cleansing" the city of its strays in advance of the Olympics, somewhere between 500,000 and 5 million cats have returned to Beijing. But is relying on volunteers to trap, neuter, and release them the best plan?
The city's notorious pollution is put into perspective by a local physician.
As Chicago readies to host the G8 and NATO summits, its police force gets ready for what could be a historic gathering of protesters.
A dozen facades that are sure to attract curious shoppers
How I'm figuring my way around Beijing
In The Spirit of Cities, author Daniel A. Bell tries to capture a city's essence, in brief