Earth Day Special: More than 100,000 Twitter feeds were analyzed to identify Twitter users with the most green street cred.
If not overhead, then what?
Dame Jane Goodall engages with kids through her Roots & Shoots program, working to connect youth with nature and community.
Youth identified as social media "influencers" are increasingly being recruited as the new marketing mules for major brands.
Unmanned aerial vehicles could be low-cost eyes in the sky for media, but there are social and safety implications.
How will smart home appliances contribute to health and sustainability in the future?
Small-scale air quality technology allows the public to make informed health decisions.
A software company serves up sustainability management as a combo.
Bird lovers will have to a wait a little longer for a Shazam-quality app.
A recap of this year's climate change progress.
More food with less waste is on the horizon, thanks to sophisticated new data-driven farming technologies.
A new global "roadmap" shows where to put roads for maximum benefit and least cost to the Earth.
OPINION: Digital technologies have huge potential for boosting global sustainability, but measuring impacts can be tricky.
A look at what makes a city "smart" and how they can exacerbate — rather than diminish — economic divides around the world.
A new U.S. database shows surprising pollution trends across the country.