Science

Pennsylvania is shutting down Three Mile Island for good next month. With the nuclear plant gone, how will the state produce carbon-free energy?

This is where Earth's refrigerator door is left open, where glaciers dwindle and seas begin to rise.

If you want to know what climate change will look like, you need to know what Earth's climate looked like in the past

From guitars to traditional medicines and from tusk to tail, mankind's exploitation of the planet's fauna and flora is putting some of them at risk of extinction.

New research from Carnegie Mellon University in Pittsburgh shows thousands of lives could be saved each year if air quality standards were tightened.

About half of the original 30,000 gallons of highly toxic hydrofluoric acid remains. “A good week,” Philadelphia Fire Commissioner Adam Thiel says.

Philadelphia’s future LNG plant gets grant for solar panels. Environmentalists say that doesn’t make the fossil fuel project right.

It wasn’t until a few years ago that researchers defined what really counts, to animals, as play.

Researchers are now calling for the world to cut back on its meat consumption. But some advocates say there is a way to eat meat that's better for the planet.

The House and the Senate have both proposed plans for Space Force in their versions of the annual defense bill.

Can you lift the mood of a public space with a fragrance?

In place of brick, builders are embracing new materials and wood-frame construction. The reasons why come down to changing economic, cultural and environmental dynamics.

The way we produce food and manage land must change radically if humans hope to avoid catastrophic global temperature rise, according to a new report.

For now, independent pipeline experts say the blast appears to have been caused by the relighting of a pilot light.

Authorities will begin neutralizing hydrofluoric acid at Philadelphia Energy Solutions any day now, but doing so comes with significant risks.