Environment

Drexel researchers suggest that after becoming gaseous again, smoke residue compounds can attach themselves to tiny air particles that come inside through an HVAC system.

Sunoco rejected a state senator’s demand that it halt construction of the Mariner East 2 pipeline in Chester County.

Pennsylvania will use the $118 million it received in a settlement with Volkswagen to fund grants and rebates for cleaner vehicles and engines.

For more than 60 years, the Natural Lands organization has worked to preserve open space and connect people to the natural world.

Wildfire danger usually remains high until around Memorial Day.

Farm to faucet Welcome to the Riverwalk along the Christina River in Wilmington. It’s one of many rivers, cr ...

Spend an afternoon on the Christina River with the Newport Rowing Club, and you'll see how these students see the water in a different light.

The Department of Environmental Protection fined Sunoco/Energy Transfer Partners an additional $355,622.

As Arctic ice caps warmed, scientists — believers and skeptics — came together to seek answers.

Scientists are learning from farmers and traditional healers — and documenting what powers their success.

Safety inspectors are recommending that Sunoco’s Mariner East 1 pipeline be restarted.

Freshwater mussels function as nature’s water treatment plants. Each animal can filter up to 600 gallons of water per month. And when w ...

California and 16 other states sued the Trump administration on Tuesday over its plans to scrap standards on vehicle greenhouse gas emissions.