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The appeals court rejected state and industry challenges to the emissions rules.
The Pennsylvania Department of Environmental Protection is urging flexible new pollution emissions rules for existing coal-fired power
The PixController technology behind the Pittsburgh bald eagle video camera broadcast on the Internet is uncovering surprises for scientists.
Joe Wos, executive director of the ToonSeum, has designed a T-shirt showcasing the baby birds.
Environmental experts target the South Side to solve the region's storm water problem.
The frozen Great Lakes have prevented fishermen from catching the key ingredient for fresh gefilte fish.
Global greenhouse-gas emissions soared to "unprecedented levels" during the decade that ended in 2010, scientists said.
The West Virginia Supreme Court will determine if Pennsylvania's Fish and Boat commission can sue Consol Energy over the 2009 fish kill.
Shenango Inc. will pay a $600,000 civil penalty and make a series of improvements at the plant, which has drawn complaints for decades.
The Beaver County site was ordered to shut down because pollutants from the unlined impoundment contaminated groundwater and surface water.
The Justice Department said it had reached a $5.1 billion agreement with Anadarko Petroleum of Texas.
The county Health Department offered the woodstove and boiler return program last year, and is offering it again through a $75,000 grant.
The head of a United Nations scientific panel warns of the already noticeable effects of climate change getting worse.
For more than 20 years, safety officials have warned about these cars as accidents involving them have multiplied.
The Obama administration outlined a new strategy Friday for addressing methane.
The agency is clarifying protection for the upstream waters that “are absolutely vital to downstream communities.”
A bill considered to be a step in the right direction in dealing with toxic algae blooms on Lake Erie is headed for a full Ohio House vote.
A daylong event of the Green Workplace Challenge will be held Thursday at Phipps Conservatory and Botanical Gardens.
The legislation would establish a funding assistance program if the property owners can't pay the repair bills.
The Allegheny Land Trust has acquired another property to protect green space along the Montour Run stream in Richland and McCandless.
Residents and businesses in Bellevue and Avalon urge Allegheny County to clamp down on unhealthy Shenango coke pollution.
Residents of Apollo and Parks are angry at the companies that left behind radioactive pollution but fear what a cleanup might unearth.