With eco-friendly consumers avoiding plastic containers, green packaging is big business. But one expert says it's policy changes that will make the most difference.
US EPA determined that Metalico is a major source of air pollution. Neighbors and air activists have been complaining about odors and pollution for years.
A new report shows the western part of the state has the most abandoned or 'orphan' gas wells in Pa. They're a big source of methane, a potent greenhouse gas.
A sociologist looks at how the environmental and community impacts of the natural gas boom in Lycoming County challenged closely-held rural values of independence and private property rights.
When the coke plant in Monessen started back up in September, so did the air quality complaints. Its previous owner agreed to a nearly $2 million settlement for air violations.
Energy Transfer faces 48 criminal charges related to construction of its Mariner East pipeline project, including a felony count of failing to report pollution.
The stinky smell that hung over Pittsburgh was caused by a broken valve at the Neville Chemical plant. Nearly 1,000 pounds of hazardous air pollutants were released.
In 2017, DEP started developing regulations for PFAS, a class of "forever" chemicals. It might be done by 2023. PFAS is linked to some types of cancers.