Energy

Allegheny County says the order is necessary to get the region's air within federal pollution limits.

Fishermen are suing oil companies for allegedly concealing from the public the knowledge that burning fossil fuels could have catastrophic impacts on the biosphere.

Oyster Creek Nuclear Generating Station in Forked River will conduct a semi-annual, full volume test of its emergency warning sirens Tuesday. 

The National Marine Fisheries Service has awarded permits to five marine contractors to conduct the tests in the Atlantic Ocean between Delaware and Central Florida.

A major international climate conference kicked off Sunday in Poland.

At $30,000 to $40,000, Volkswagen's electric car would be able to compete with an upcoming $35,000 make of the Tesla Model 3.

Residents want the lines stopped while judge considers whether to halt them permanently.

The largest coal ash pond east of the Mississippi is asking the state for a new pollution discharge permit. Little Blue Run, is on the Pennsylvania–West Virginia border.

The 42-page report published Thursday by Pennsylvania’s bipartisan Nuclear Energy Caucus was nearly two years in the making.

The Trump administration is authorizing the use of seismic air guns to find oil and gas formations deep underneath the Atlantic Ocean floor.

Guests: Jean Chemnick, Robert Kopp, Stephen Pacala The UN climate change conference in Katowice, Poland starts Mo ...

North Dakota's oil production is growing so fast the state likely will run out of pipeline capacity next year.

In the global fight against climate change, the United Kingdom has quietly notched an unusual — and somewhat mystifying — victory.

At least five homes were destroyed and a person was killed. More than 20 others were injured.

A bipartisan group of governors, including Pennsylvania’s Tom Wolf, is calling on federal regulators to look at unifying the nation’s power grids.