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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.
After a fiery train derailment Monday, firefighters went door to door evacuating residents during an unrelenting snowfall.
The sonic boom and explosion produced a burst of light that, for an instant, was comparable in size to the sun.
About 100 to 125 people displaced by the derailment are staying in hotels in Oak Hill and Charleston, officials say.
At about 7:30 p.m. Tuesday the female eagle laid her fifth egg, the first of 2015.
If City Council agrees, 20 trucks will get systems by Optimus Technologies to allow them to cut pollution using biofuel.
Pennsylvania has another record-setting year of production amid low natural gas and liquids prices.
The incident sent sending at least one into the Kanawha River, igniting at least 14 tankers and sparking a house fire, officials said.
Colcom, founded by Cordelia Scaife May and headquartered Downtown, advocates limits — on depletion of natural resources and on immigrants.
Pittsburgh’s Colcom Foundation is passionate about population limits, but the immigration groups it supports don’t emphasize it
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
Albert Presto has been monitoring air pollution levels in the area for two years and will share his maps at a public forum tonight.
Republicans say the regulations are an overreach that will harm farmers and developers while usurping powers that should be left to states.
A coalition formed to preserve the lengthy Western migration route of mule deer may prove to be a precedent for other alliances.
A spokesman for U.S. Sen. Bob Casey said the funding is guaranteed and requires no further approval.
The program focuses on the lakes’ most serious long-term ecological challenges such as invasive species and toxic pollution.
They are trying to rehabilitate great white sharks’ image by making a documentary and traveling to Capetown, South Africa, in early May.
A New York Times-Stanford University poll finds most Americans endorse federal action to counteract global warming.
By President Obama’s executive order, federal agencies must adopt stricter building and siting standards.
Gov. Tom Wolf officially ending plans by the Legislature to raise dollars for the budget this fiscal year through new drilling deals.
A new survey shows scientists and the public are divided over climate change, using animals in research and genetically modified foods
Federal lawsuits aim to get the EPA to control noxious chemicals and odors produced by factory farms.
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.