Low-producing wells provide just 6% of oil and gas production in the U.S. But a new study found they emit half of the industry's climate-warming methane.
Mt. Washington has the best views of Downtown Pittsburgh. But if you look down the steep hillside, you'll see a sorry site filled with bottles, cans, and plastic debris.
To get a glimpse of much of Nine Mile Run, you have to look under a manhole cover. So Artist Ginger Brooks Takahashi created a new portal to connect people to the stream.
The plan for the 15-mile stretch of riverfront in the Golden Triangle would bring swimming to the Strip District and a new park near the West End Bridge.
PFAS is a class of toxic chemicals that can cause an increased risk of health problems, including cancers. The DEP wants to regulate two of them in drinking water.