pollution
In a Kentucky lake, fish tell the story of long-term coal ash pollution
About 1 in 10 fish in the lake show serious physical deformities — the result, one biologist says, of selenium poisoning.
Where using plastic bags can land you a $38,000 fine
Plastic trash is a big problem. How much do you throw away? (QUIZ)
It's not just about a pipeline. Native activists say Dakota battle is their biggest stand in decades.
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#NoDAPL has momentum, but will it drive Native Americans to vote?
Sacred-site preservation and civic engagement are not the same.
Canaries in the Coal Smoke
An art historian and a biologist discovered a novel way to measure historical air pollution levels: looking soot caught in the feathers of birds from 140 years ago.
Education and funding are critical issues facing native communities in the US
On an Indian reservation in Nebraska, state and federal politics interfere with the effort to simply educate the kids.
Protesters say mass arrests won't stop their fight against a North Dakota oil pipeline
"One thing that I repeatedly heard," says Jenni Monet, a journalist on the scene, "is that this fight is not over."
The Standing Rock Sioux 'know what they're doing' in North Dakota
For weeks, members of the Standing Rock Sioux have gathered in Cannonball, North Dakota, standing against the Dakota Access pipeline. The government has now halted construction pending reassessment of the project.
Here's where to find some of the cleanest air in the world
Want to visit a place with clean air? Really clean air? Maybe the cleanest of any urban area in the world? We check out a place north of the Arctic Circle that gets an A+ in the newly updated WHO Global Urban Ambient Pollution Database.
She loved to run. In India, she couldn't. It was unhealthy.
The haze is often so thick that people drive with their fog lights on until mid-morning. New York's air, in comparison, "feels as clear as water from a mountain stream." Rhitu Chatterjee writes.
Fighting the haze at the Grand Canyon
There's still visibility issues at the Grand Canyon, but things seem to be getting better. Here's how.
An investigation has found lead in 2,000 US water systems
A recent investigation by USA Today into lead levels in water systems across the country found more than 2,000 examples of systems that pose a risk to consumers.
Mexico City residents are forced to cope with bad air
New restrictions have reduced the number of cars on the road, but that might not make much of a difference.