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Threatened by the rise of rooftop solar, Arizona utilities try to pack a state commission with their hand-picked candidates

Sierra's 2016 rankings of the most environmentally sustainable colleges and universities in the United States

2016 is the first presidential election in 50 years during which citizens won't have the full protections of the Voting Rights Act

How campaign finance corruption undermines policies to protect the environment

Last May, the tribe stopped a coal terminal from being built on sacred land

Two sisters use social media to draw attention to wastewater lagoons across the street from their house

A mom on vacation sees her kids thrive when they leave the city and head for the hills

Big Coal may be dying, but it's still trying to strangle clean energy in the cradle

Tips for viewing one of summer's greatest natural light shows

Fermentation is in, thanks to new research on the benefits of having a healthy gut biome

A roundup of alternatives to single-use plastics

A lion or buffalo could easily kill you, but not as easily as we're killing them

North Carolina is worried about bathrooms. Toxic coal ash, not so much.

In Door to Door, Edward Humes takes us through the complex system of transportation in the United States

Sierra visits a floating lodge in British Columbia, in the heart of where the wild things are

Mr. Green ventilates the issue.

It's like Amway, except with solar-powered lights and ovens in the African bush

The busy enviro's cheat sheet to what's happening on our planet

The paleontologist from the PBS series Dinosaur Train worries that outdoor playtime is going extinct