Kobe, a female polar bear, takes a swim at the Pittsburgh Zoo & PPG Aquarium.

Captivity may cause stress for polar bears, but Arctic also poses problems

Polar bears evolved to range hundreds of miles — something they can’t do in zoos and won’t be able to do as the Arctic shrinks.

2 days ago

 The CSX Corp train that derailed, ignited and spilled into the Kanawha River in Mount Carbon, W. Va., can be seen from across the river.

In West Virginia, a collective sigh after the chaos

After a fiery train derailment Monday, firefighters went door to door evacuating residents during an unrelenting snowfall.

1 week ago

 Typically, a large portion of the meteor is lost to light and heat in the atmosphere that produces the fireball.

500-pound meteor streaks through Western Pennsylvania sky, captured on cameras

The sonic boom and explosion produced a burst of light that, for an instant, was comparable in size to the sun.

1 week ago

 Jared Jones, 14, watches snowfall from a window with his brother Cayden Carelli, 6, at the Holiday Lodge Hotel and Conference Center in Oak Hill, W.Va. Jared and Cayden’s family lives in Adena Village, and were evacuated after the CSX train derailment.

Displaced families try to adjust after West Virginia oil train derailment

About 100 to 125 people displaced by the derailment are staying in hotels in Oak Hill and Charleston, officials say.

1 week ago

 The female eagle tends to her egg.

Resident eagle in Pittsburgh’s Hays community lays another egg

At about 7:30 p.m. Tuesday the female eagle laid her fifth egg, the first of 2015.

1 week ago

 Biodiesel pump at Baum Blvd. Automotive.

Pittsburgh looks to add biofuel systems to trucks

If City Council agrees, 20 trucks will get systems by Optimus Technologies to allow them to cut pollution using biofuel.

1 week ago

DEP: Shale producers hit 4 trillion cubic feet of gas in 2014

Pennsylvania has another record-setting year of production amid low natural gas and liquids prices.

1 week ago

 A CSX Corp. train burns Monday night after a derailment in Mount Carbon, W.Va., as seen from across the Kanawha River in Boomer, W.Va. The train was hauling crude oil from North Dakota. The accident set at least 14 tankers ablaze, destroying a house and forcing the evacuation of two towns.

West Virginia train derailment sends oil tanker into river

The incident sent sending at least one into the Kanawha River, igniting at least 14 tankers and sparking a house fire, officials said.

1 week ago

 Colcom founder Cordelia Scaife May, at left in 1965, had a lifelong interest in population issues inspired by Margaret Sanger, a family friend who launched America’s family planning movement. As for the envioronmental side of Colcom, John Rohe, the organization’s vice president of philanthropy, right, said he sees no conflict. Sustainability is all about limits, he said, whether it’s protecting clean water or  controlling the impact of immigration on natural resources. “To maintain quality of life, you have to maintain a balance with your surroundings,” he said. “That is the consistent theme.”

Pittsburgh's Colcom Foundation plays major role in immigration-control debate

Colcom, founded by Cordelia Scaife May and headquartered Downtown, advocates limits — on depletion of natural resources and on immigrants.

1 week ago

Colcom's roots in population control don't resonate with immigration groups it funds

Pittsburgh’s Colcom Foundation is passionate about population limits, but the immigration groups it supports don’t emphasize it

1 week ago

Fossil-fuel limits emerge as goal for deal on global warming

U.N. climate talks in Geneva yield draft text full of options that will be debated ahead of December concluding session for new treaty in

1 week ago

 The American Lung Association says Pittsburgh is the most polluted city east of California.

How polluted is the Pittsburgh region? CMU professor helps shed light on air quality

Albert Presto has been monitoring air pollution levels in the area for two years and will share his maps at a public forum tonight.

2 weeks ago

  House Transportation and Infrastructure Committee Chairman Rep. Bill Shuster, R-Pa.

New water system proposal draws criticism from Republicans

Republicans say the regulations are an overreach that will harm farmers and developers while usurping powers that should be left to states.

3 weeks ago

Groups move to protect deer migrations

A coalition formed to preserve the lengthy Western migration route of mule deer may prove to be a precedent for other alliances.

3 weeks ago

 A Norfolk Southern train makes its way along the Ohio River past the Montgomery Locks and Dam on Jan. 7.

Army Corps to redirect $58 million for upgrades to Pittsburgh locks, dams

A spokesman for U.S. Sen. Bob Casey said the funding is guaranteed and requires no further approval.

3 weeks ago

Obama seeks $50 million cut in Great Lakes restoration effort

The program focuses on the lakes’ most serious long-term ecological challenges such as invasive species and toxic pollution.

3 weeks ago

 From left to right, Point Park University students Jaz McKibben and Jordan Durham, both 19 and cinema production majors, and Blaise Kepple, 18, a global cultural studies major, will embark on a journey to South Africa to film a documentary about sharks.

Three Point Park students seek funding to make shark documentary

They are trying to rehabilitate great white sharks’ image by making a documentary and traveling to Capetown, South Africa, in early May.

3 weeks ago

Most Americans back climate action, poll shows

A New York Times-Stanford University poll finds most Americans endorse federal action to counteract global warming.

3 weeks ago

Federal agencies to plan for rising seas

By President Obama’s executive order, federal agencies must adopt stricter building and siting standards.

3 weeks ago

 Gov. Tom Wolf signs an executive order restoring a moratorium on new drilling leases involving public lands, Thursday, January 29, 2015, at the Benjamin Rush State Park in Philadelphia.

Gov. Wolf bans new leases for drilling on state lands

Gov. Tom Wolf officially ending plans by the Legislature to raise dollars for the budget this fiscal year through new drilling deals.

3 weeks ago

People trust science but disagree with scientists, Pew says

A new survey shows scientists and the public are divided over climate change, using animals in research and genetically modified foods

3 weeks ago

Suits take aim at factory farm air pollution

Federal lawsuits aim to get the EPA to control noxious chemicals and odors produced by factory farms.

4 weeks ago

 Gov. Tom Wolf signs two executive orders at the Pennsylvania Capitol in Harrisburg.

Gov. Tom Wolf to reinstate moratorium on drilling in parks, forests

Wolf plans to reinstate a moratorium on leasing new oil and gas wells in the state’s forests and parks, thus fulfilling a campaign pledge.

4 weeks ago


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