Last August, 3 million gallons of orange wastewater flooded into Colorado's Animas River, ending up in Lake Powell. But Congress has failed to come up with a way to stop this from happening again.
In a historic civil settlement, VW will buy back or repair cars sold as "clean" but that in fact polluted above legal levels. The company will also pay nearly $5 billion for environmental reparations.
Lead seepage into the drinking water in Flint, Mich., has causing a major public health crisis and prompted President Obama to declare a federal state of emergency. This is how it unfolded.
A chemical widely used to make many water-resistant and nonstick items can be found in many community water supplies. But elevated levels of PFOA are turning up in three Northeastern states.
Speaking with NPR, Matthias Mueller blamed the problem on a misunderstanding of U.S. law and said the company doesn't have an ethics problem. Less than a day later, he asked to clarify those remarks.
The U.S. government says the German automaker's software allowed 10,000 more diesel cars than it had acknowledged earlier to run more cleanly during emissions testing than in real-world conditions.
Montana has one of the heaviest lifts of any state to comply with the EPA's plan to reduce carbon emissions. But the state is also rich in renewable energy, and the regulations may be a boon to some.
The spill of heavy metals into the Animas River has contaminated water for hundreds of farmers in the Navajo Nation downstream, bringing up memories of past environmental disasters.
The report says there are few incidents of tainted water given the number of wells. Energy companies agree. Environmentalists accuse the industry of undue influence over the study.