Cities moving toward 100 percent renewable energy face political and economic challenges more than technological ones.

The U.S. Conference of Mayors Resolves to Support 100% Renewable Energy

Just in time for President Trump’s 'Energy Week.’

Mapping the Shout-Outs of Lil Jon and Ice Cube

Has your city had the honor of being profanely recognized by these hip-hop kings?

Travis Kalanick is pictured.

Lab Report: Kalanick Out at Uber

A morning roundup of the day’s news.

Where's the Real 'Next Silicon Valley'?

A new report digs into the metrics of America’s emerging tech hubs, and finds some surprises.

Apple CEO Tim Cook is pictured

Lab Report: Apple's Foray Into Self-Driving Cars

A morning roundup of the day’s news.

Google's New Product Puts Peer Pressure to a Sunny Use

The company’s “Project Sunroof” now shows you which of your friends have already put solar panels on their roof.

Can Cities Hack Diversity?

Pittsburgh has declared itself an “inclusive innovation city,” meaning it is committed to making sure that white people aren’t the only beneficiaries of the tech-based economy it’s trying to cultivate. Here’s how that’s working out.

Electric vehicles are getting cleaner as U.S. electricity production moves away from fossil fuels.

Electric Vehicles Are Cleaning Up

As U.S. electricity production moves away from coal and fossil fuels, plug-ins look better than ever.

Detroit Imagines a Citizen-Led Smart City

Instead of deploying urban sensors as instruments of surveillance for technocrats, what if vulnerable communities controlled the gear—and the data?

Lab Report: Trump to Pull Out of Paris Climate Agreement

A morning roundup of the day’s news.

A view of a grid station of a coal-fired power plant of Essar Power is pictured in Salaya village in the western state of Gujarat, India, October 4, 2016.

Will India Ever Need Another Coal Plant?

The country’s energy infrastructure is changing rapidly as solar prices plummet.

Fortress Britain's Coming Crackdown

In the wake of the Manchester attack, the U.K. government is stationing troops in cities and fast-tracking new laws to access encrypted messages.

A photograph of bicycles in China that are equipped with air filtration equipment to protect riders from smog.

What If Bikes Ate Smog?

No, not metaphorically. We’re talking about sending fleets of bicycles with air filtration equipment into the streets to remove nasty airborne particles.