Clean Air

City viewed from above (© Gianfranco Vivi/Shutterstock)

U.S. air-quality monitoring protects people worldwide

U.S. embassies' air-quality monitoring is providing environmental data around the world. Learn how this monitoring helps people protect their health.
Male and female hiker walking through giant redwood forest (© Shutterstock)

America has deep roots in reforestation

Did you know that reforestation programs have been around in the United States for more than 100 years? Learn about that legacy and how it helps the world.
Man on a skateboard walking his dog in the street (© Chris Carlson/AP Images)

Learn how air quality improved in these cities

Three large U.S. cities have used new technology and environmentally friendly policies to help their residents breathe easier.
Country road at sunset (Shutterstock)

Nuclear power’s growing role in a clean energy future

A new U.S.-backed initiative is promoting innovative ways to integrate nuclear power into carbon-free and renewable energy systems.
Man driving utility vehicle toward industrial structures and smokestack (© Luke Sharrett/Bloomberg/Getty Images)

A promising approach boosts oil production — cleanly

It may be counterintuitive, but a new law could make fossil fuel companies leaders in kicking carbon capture into the mainstream — and helping the environment.
Black and white mural on city wall (Graviky Labs)

This ink is made of pollution. Really. [video]

Catching carbon soot in car exhaust, Anirudh Sharma of MIT discovered a way to recycle pollution into something beautiful: Air Ink.
Driverless shuttle (© AP Images)

Las Vegas and Paris experiment with driverless cars

More cities across the world are experimenting with driverless vehicles on public streets. Las Vegas and Paris plan to deploy some later in 2017.

Cities as policy labs: L.A. cleans up its smog

With the largest fleet of natural gas buses in the U.S. — about 2,200 — Los Angeles has become a leader in cutting carbon emissions.
Aerial view of city at meeting of rivers (© AP Images)

Cities as policy labs: Pittsburgh’s towering experiment

Once a declining industrial metropolis with steel mills spewing black smoke and soot into the sky, Pittsburgh has transformed itself into a vibrant green city.