CO2 emissions in 27 major cities have declined since 2012
A series of eco-friendly measures are responsible.
The West Coast is finally getting an earthquake early warning system
This will save lives
Airbnb helps hosts in San Francisco get city approval online
The system comes after months of challenges from San Francisco officials.
AI vision can determine why neighborhoods thrive
And it's not necessarily for the reasons you'd expect.
Google sister company wants to build smart city districts
Sidewalk Labs would design whole technology-laden districts.
You can predict city gentrification through check-ins and tweets
Twitter and Foursquare data shows where the well-to-do are likely to move next.
6 self-contained skyscraper super cities
Some stand as tall as two and a half miles high.
Gett's latest expansion takes it beyond Uber in the UK
Uber is finally starting to ramp up its operations in the UK, but it faces tough competition from...
London tests traffic lights that stay green for cyclists
Cycling is one of the quickest ways to get across London, and soon adaptive traffic lights could m...