First-time trucking of weapons-grade enriched uranium waste in liquid form has raised concerns about safety and prompted a court challenge.
Mr. Obama will travel this week to Midway Atoll, a remote spit of land within the Papahanaumokuakea Marine National Monument.
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
This is the 10th record hot month in a row, according to the agency.
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
Fresh evidence suggests satellite measurements have been distorted by the eruption in 1991 of Mount Pinatubo in the Philippines.
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.
Attention is focused on America’s decaying pipes after lead contamination in Flint, Mich.; Washington, D.C.; and Newark, N.J.
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.
And the distribution of clouds has shifted in such a way as to make global warming worse.
A new Senior Environment Corps chapter is being created in Beaver County to join other volunteers around the state.
Kids who sucked their thumb or bit their nails were less likely to get allergies as teens and adults, according to a study in Pediatrics.
The report released by Global Witness called the 185 deaths it uncovered “shocking,” a nearly 60 percent increase from the previous year.
A survey on the Pittsburgh Parks Conservancy’s website allows people to share ideas for the redevelopment of Heth’s Run in Highland Park.
When overburdened sewerage pipes overflow into the rivers during heavy rains, the public will now receive electronic alerts for safety.
The state House has rejected a proposal that would have allowed development of hotels, amusement parks and water slides on state park lands
DCNR designates five new Wild Areas in state forests while legislators seek to open state parks for commercial development and recreation.
That number grew to $5 billion more than previously reported on the eve of a settlement to be filed today in a San Francisco court.
Some families concerned about the Zika virus are looking to commercial sprays to treat their property.
The findings demonstrate a powerful method of carbon storage that could reduce some of the human-caused greenhouse gas emissions.
The sanitation authority’s Summer Science camps prepare the next generation for the challenges of a changing environment.
The expanded network of seismic monitors will provide an open and ongoing record of shaking beneath Pennsylvania.
Despite predictions of swarms and nighttime noise, the insect has been mostly absent in the city.
The beermaker will pay approximately $7 million for improvements and $2.8 million in fines for wastewater issues.
It is the first major overhaul of toxic chemicals rules in 40 years.
The Pennsylvania Republican is labeled a member of the “Dirty Dozen” for his record on clean air and water protections.
The 660-acre plot in Hays is now a wild, wooded treasure of views, old trees, streams, a waterfall — and a yet-unknown price tag to develop.
The 2016 race downward in Arctic sea ice continued in May with a dramatic new record.
Part of a $1 million grant from the Richard King Mellon Foundation, Girls Scouts are encouraged to spend more time outdoors.
The U.S. Army Corps of Engineers and Riverlife propose a $10.8 million project to restore more natural riparian area along upper Ohio River.
Zoos from Maryland to Arizona were assuring visitors that their facilities are safe.
Nearly 40 previously unreported major sources of sulfur dioxide emissions were revealed.
The reef has seen major bleaching in some areas, and the expectation has long been that this event would result in significant coral death.
State declares ”Code Orange” air pollution day due to high smog levels and is urging young and elderly to restrict outdoor activities.