A plume of exhaust extends from the Mitchell Power Station in Washington County in September 2013.

Pa. impact may be 'minimal' as Supreme Court overturns EPA's mercury rule

The 5-4 decision found the EPA did not consider compliance costs in regulating power plant emissions of mercury and air pollutants.

1 day ago

U.S. top court invalidates Obama administration EPA regulation

The justices ruled in a 5-4 decision that the EPA should have weighed the cost of compliance in deciding whether to regulate the pollutants.

1 day ago

 Dennis Bateman, exhibit director at the Carnegie Science Museum, shows one of the displays from the "H2Oh!: Why Our Rivers Matter" exhibit.

Carnegie Science Center goes with the flow with 'H2Oh!'

Water Weekends at the Carnegie Science Center are filled to overflowing with cool activities about H2Oh!

4 days ago

 Urgenda Foundation lawyer Koos van der Berg, left, is congratulated after a Dutch court ordered the government to cut the country’s greenhouse gas emissions by at least 25 percent by 2020 in a groundbreaking climate case that activists hope will set a worldwide precedent in The Hague, Netherlands, on Wednesday.

Landmark Dutch ruling: Cut emissions to protect citizens

It was a landmark ruling in a case brought by hundreds of citizens that could pave the way for similar legal battles around the world.

6 days ago

World briefs: Pakistan heat wave tollclimbs to 650

Plus: Catholic divorcee rules, Greek concessions rile, Taliban pushed back, Endangered turtles found

1 week ago

 Mt. Lebanon commissioners discuss deer management improvements during a Monday meeting.

Mt. Lebanon's deer management meeting sparks no protests

The meeting was not billed as a decision-making event, and no decisions were made.

1 week ago

White House pushes tougher rules for fuel economy of heavy trucks, buses

The EPA wants higher fuel-economy standards for heavy-duty trucks and buses to further cut carbon-dioxide emissions.

1 week ago

 “Pittsburgh’s not cruising along like the most thriving areas of the country, but you’re doing pretty well,” said one labor economist.

Study: Pittsburgh economy solid but lags in climate, population growth

The Pittsburgh region’s growth is above the national average but not thriving like other areas, a U.S. Conference of Mayors report says.

1 week ago

South Fayette sets hearing on revised drilling ordinance

South Fayette commissioners will hold a public hearing July 8 on a proposal to restrict drilling sites to areas zoned for industrial use.

1 week ago

 Elise Truchan looks out from the top window of the treehouse in the tree on the front lawn of her family's home in Leet Township.

Treehouse or accessory structure? One Leet family mired in conflict

What the Truchan family sees as a front yard treehouse, the township sees as a prohibited building.

1 week ago

 Dave Hunt of Overbrook, bikes to work along Penn Avenue in the Strip District on Monday. Dry weather conditions haven’t been a problem in the Pittsburgh area, where precipitation levels have been 2 or more inches above normal over the past week, according to the National Weather Service.

Most of Pennsylvania under drought watch; Westmoreland, Mercer among counties

A drought watch calls for a voluntary 5 percent reduction in non-essential water use.

1 week ago

DEP fines Range Resources $8.9 million for Marcellus shale gas well

The state told Range to submit a plan to repair the well’s cement casing, but it failed to submit a satisfactory plan, officials said.

2 weeks ago

Officials: Circuit glitch likely caused chemical plant fire

Officials said thousands of dead fish had been seen over a 15-mile span of Conewago Creek and the state will monitor for contaminants.

2 weeks ago

Pope backs climate change science, denounces world leaders

Leaked draft of Pope Francis’ encyclical on climate change denounces leaders who subvert global action to advance national self-interest.

2 weeks ago

 Chuck Leavell,  keyboardist and musical director for The Rolling Stones, is a sustainable tree farmer near Atlanta and an environmentalist.

Environmentalist doubles as member of the Rolling Stones

Rolling Stones keyboardist and musical director Chuck Leavell loves music, family and the environment.

2 weeks ago

Mt. Lebanon plans switch to 'pay as you throw' garbage collection

The new program could have residents buy designated bags for their refuse, so that households that produce more garbage would pay more.

2 weeks ago

In twist, Obama emissions plan satisfies industry, worries greens

But the Environmental Protection Agency did not immediately propose new regulations.

2 weeks ago

Residents warned after bear cubs sighted in Shaler

The sightings were reported in the northern part of the township near Route 8 and Mount Royal Boulevard.

3 weeks ago

 German Chancellor Angela Merkel  speaks with U.S. President  Barack Obama at the Schloss Elmau hotel near Garmisch-Partenkirchen, southern Germany, on Monday during the G-7 summit.

G-7 sets far-off goal to move away from fossil fuels

The world should move away from using fossil fuels by the end of this century, G-7 leaders said Monday.

3 weeks ago

Conservation plan aims to protect Raccoon Creek Watershed

The plan creates a template for the future development of natural resources and also allows for preservation of resources in the area.

3 weeks ago

Study: Global warming’s pace steady since 1998

NOAA researchers report that the pace of global warming hasn’t slowed since 1998, challenging climate-change skeptics’ key argument.

3 weeks ago

Drill plans hit roadblock in Penn Township

Township commissioners directed a Marcellus Shale gas drilling company to delay drilling in the northeastern corner of the township.

3 weeks ago

Environmental groups want state to reject FirstEnergy's coal ash disposal plan

Groups say a plan to move ash on the Ohio and Monongahela rivers to a Beaver County landfill poses possible risks to public water sources.

3 weeks ago

 An EPA study ordered by Congress in 2010 concludes that the number of actual problems caused by fracking was relatively small compared to the thousands of wells that have been drilled.  But the study also identified a series of “vulnerabilities” created by the process.

EPA report: Fracking has caused isolated, not widespread, water pollution

The study by the Environmental Protection Agency is the first to conclude fracking can cause limited water pollution.

3 weeks ago

 Over 2012 and 2013, more than 30,000 tons of recyclable material was collected in the city.

Recycling of solid waste continues to grow in Pittsburgh, but city hasn't reached its goal

The review of 2012 and 2013 shows that recycling is on the increase in the city, but so are injuries to refuse workers.

4 weeks ago