Matt Petersen is L.A.'s first chief sustainability officer, charged with drafting an ambitious plan for a city grappling with drought.
Millennials and older Americans agree on city accessibility, and the lobbying powerhouse of the AARP is emerging as a key advocate.
Scott Kratz had a successful career in museum education until he stumbled upon a new calling: building an ambitious, elevated park over the Anacostia River in Washington, D.C.
The country's first institute of adaptation science will help Norfolk, Virginia, deal with its steadily rising waters.
Since 1997, the Center for Urban Pedagogy has used graphic design to explain byzantine local policies and processes to New Yorkers.
For nearly two decades, Stacy Mitchell has tried to level a playing field she sees as tilted toward big retail.
Navigation apps are transforming the way we experience urban environments, for better and for worse.
Can new train service between Miami and Orlando be a model for the rest of the country?
In a city where nine in ten drive to work, the answer could reshape the future.
Valentine's Day at the New York City Transit Museum's missed connections party.
An elegy for the paper symbol of the mechanical age.
The city's 1,200 Buildings program has been cited as a model.
The IPCC's latest assessment is frightening... but it's also bolstering the claims of deniers.
How do you reduce the greenhouse gas emissions of skyscrapers? For starters, make a chart.
One man's crusade to get restaurants, shops and offices to receive all their goods between 10 and 6.
Inside New York City's plan to reduce the annual miles driven by its sanitation department.
Five percent of vehicles are responsible for 90 percent of toxic emissions. Now we can figure out who the culprits are.
Stanford scientists say they've figured out how, and now the challenge will be to make it cheap enough to do on a large scale.
For one thing, consumers have no tolerance for risk.