The head of the environmental program at Bloomberg Philanthropies makes the case in this compelling video.
London's most athletic vermin run the torch in this charming animation.
Watch cars get launched into the air like rockets due to ill-fitting manhole covers.
Ben Jenkin jumps, tumbles and climbs his way through Miami Marine Stadium.
Smart design will reduce heat energy use, electricity use and water consumption.
In the future, urban planners could lose their jobs to ultra-efficient slime molds.
You can set your iPod to blast from a bench in Moscow. Ugh.
There's fun and profit in having giant shredding rotors tear the flesh off deceased vehicles.
Turning this public park staple into a personal gym.
With a bit of CGI help, we now know what it would look like if New York City was one big amusement park.
A light and sound installation helps foreigners pronounce crazy Danish street names.
A video camera and an unmanned aerial vehicle offer a unique tour of the city.
Hundreds of apartment buildings, schools and retail units sit empty, priced out of reach for most Angolans.
A new measurement - based on satellite images - highlights cities' key role in economic development.
But don't ride it into oncoming trams, obviously.
The mayor discusses the challenges and opportunities that lie ahead.
Examples of industrial operations edging in on public lands, and the people who oppose them.
One British designer imagines future office space as symbiotic orchid farms.
"Kinetic Rain" is airport art that actually doesn't suck.