The Pennsylvania Supreme Court has declared unconstitutional major provisions of Act 13, the state’s 2012 oil and gas drilling law.
The Senate has already authorized the projects, but other parts of the upper chamber’s legislation differs from the House version.
Top House aides say congressional leaders have broken a stalemate over money to address the Flint, Mich., water crisis.
The new report is another sign that atmospheric pollution is a significant threat to global public health.
The skunk was struck Wednesday on High Street, and officials urged residents to use caution when they come across wild animals.
Pleasant Hills Middle School pupils took part in a University of Pittsburgh project by molding model frogs to obtain data on climate change.
The president established a new panel to provide national security agencies with better data about the potential impacts of climate change.
Gov. Tom Wolf nominates Patrick McDonnell for the state DEP’s top job.
No country seems to have embraced a plastic ban as sweeping as France’s will be.
August’s average temperature was 1.66 degrees above the 20th century average, 0.09 degrees above the previous warmest August.
Popular attraction gives public top-to-bottom look at sanitation facility in Woods Run.
Daylighting Negley Run and raising Washington Boulevard could solve chronic flooding along Washington Boulevard.
Replacing lead water lines in the Pittsburgh Water and Sewer Authority system will probably cost hundreds of millions of dollars.
Activists and Lawrenceville residents call for fast action on a permit to restrict emissions from the McConway & Torley foundry.
Pittsburgh's cap gets another feather with induction into Biophilic Cities network, an effort to integrate nature into daily city life.
The president said his action is a needed response to dangerous climate change, oceanic dead zones and unsustainable fishing practices.
A local federal office houses a division of the Army Corps of Engineers, which has the ability to deny permits for the 1,172-mile pipeline.
William Capouillez will pay $75,000 for ethics violations involving gas company leases.
The Reef Environmental Education Foundation uses “volunteer” scuba divers and snorkelers to gather data about the world’s fish population.
Allegheny County Sanitary Authority’s 14th annual open house next Saturday is expected to be flush with tours and educational events.
The new $19 million Frick Environmental Center project will open the “greenest” building in the world to the public on Saturday.
Spill at Westmoreland RIDC brings county hazmat team and causes cancellation of classes at community college.
Just 3,800 Grauer’s gorilla remain, a sharp decline in numbers for the world’s largest gorilla.
The president left Friday for China, where he will meet today with leader Xi Jinping before a Group of 20 summit.
Guidelines were issued Thursday for restricting energy development, livestock grazing and other activities on public land in the West.
Last week, he announced that he would make the Papahanaumokuakea site the largest ecological preserve on earth.
On Thursday, Pope Francis added care for the environment as an eighth work of mercy.
The Labor Day weekend will feature clear skies and high temperatures in the mid to upper 70s and lows in the high 50s to low 60s.
The Interior Department is dedicating $29.5 million to projects to improve forest health and reduce the threat of catastrophic wildfires.
First-time trucking of weapons-grade enriched uranium waste in liquid form has raised concerns about safety and prompted a court challenge.
The rift had grown another 13.67 miles since it was last observed in March 2016, and has widened to about 1,148 feet.
Supporters and opponents testify at final state hearing on 350 mile long, $2.5 billion natural gas liquids pipeline project
Zoo’s five sand tiger sharks heading to Florida facility for breeding, tank will become home to elephant seal
While the five sand tiger sharks are on loan to Florida, their tanks will become a new home for a rescued elephant seal.
NRG Energy’s Cheswick power plant discharged fourth most lead of any power plant in the nation
Long-term exposure has been linked to increased risks of kidney cancer, thyroid problems, high cholesterol and hormone disruption.
Oysters in many of the protected areas are larger and more abundant and show a greater ability to reproduce.
Drummers, elected officials and residents turned out for the dedication of the 1.1-acre green space, formerly known as Cliffside Park.
PWSA must first find which lines are made of lead, then replace 7 percent of them per year.
National bird program assesses urban and suburban habitat while engaging children and adults in Pittsburgh region backyards.
Federal pilot project in Cambria County targets environment and employment benefits that could help coalfield communities nationwide.
The finding is based on a multi-agency report on a long-term fish sickness and pollutants emptied into Chesapeake Bay.
Lack of support from Pennsylvania coalfield congressmen could doom $1 billion mining reclamation and job creation legislation.
New Zealand is a nation that takes its birds seriously, and it’s got very special ones.
Pennsylvania health officials expect no increases in overall Zika testing volumes or in confirmed cases as a result of the change.
The state Fish and Boat Commission confirmed through photos that the fish, which flopped back into the water, was a piranha.
Weather forecasters predict a four-day stretch of 90-degree days with a break Monday, when clouds and thunderstorms are expected to move in.
Calculations indicate that there is a 99 percent probability that 2016 will be hotter than 2015, the current record holder.
Hydrofluorocarbons, or HFCs - spare the ozone layer but are still powerful greenhouse warming agents.
The 18-mile pipeline construction project is fined $1.5 million for landslide, waste water discharges that impacted streams and wetlands.
Michael Mann, a prominent climate scientist at Penn State University, will lead the online conversation this afternoon.