Environment

Older U.S. east coast cities are leaking nine times as much natural gas into the air — from homes or pipes heading into houses — than the federal government had thought.

A work program designed to help keep Delaware’s streets clean is also helping those struggling with addiction work to recovery.

More than 200,000 utility customers are without power at the Jersey Shore early Monday evening following a line of severe thunderstorms. 

Dozens of protesters with the Sunrise Movement crowded offices in a building where the Democratic Part once held offices. Ten people were arrested.

Philadelphia officials said the death of a man in his 70s in West Philadelphia on Saturday was attributed to the heat, when temperatures hit 97 degrees.

Damage pushes the refinery to file for Chapter 11 again. Philadelphia Energy Solutions expects to restructure with a $100 million financial agreement.

The regal fritillary, a rare butterfly that’s nearly disappeared from the eastern United States, has found refuge in a surprising place — a National Guard training center.

Philadelphia Energy Solutions’ future is unclear and the debate over what should happen to it mirror a conversation that’s taking place across the U.S.

The mayor of Ocean City, New Jersey says seagulls have become "very aggressive" in the municipality and warns that feeding the birds is against the law. 

As temperatures soar and Philly officials invite residents to cool off in air-conditioned city buildings, Maryland lawmakers want to mandate landlords provide AC at home.

An environmental organization and the U.S. Navy teamed up Tuesday to deploy one million oysters at a "living shoreline" at Naval Weapons Station Earle on the Jersey coast.

It's used to make cleaner-burning gasoline in about four dozen refineries in the U.S., including two in Philly region.

The “feels like” temp could hit 113 degrees.

Science has largely debunked the idea that the moon influences our behavior — but recent research is questioning that modern wisdom.

Heavy rain shifted the lid of a tank at PES refinery causing fumes to escape. City officials say there is no sign abnormal pollutants were released