Marie Cusick

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

A Salt Lake City-based company is in talks to purchase and dismantle Three Mile Island's long-mothballed Unit 2 reactor -- the site of the nation's worst nuclear accident in 1979.

The power grid operator has received appeals from around the country to ensure its next leader prioritizes clean energy.

Pennsylvania faces unprecedented, deadly heat waves in the coming decades unless aggressive action is taken to combat climate change, according to a new report published Tuesday by the Union of Concerned Scientists.

The training center welcomes hundreds of people each summer who want to see the "regals."

Agriculture Secretary Russell Redding joined Gov. Tom Wolf Tuesday for a tour of an area in Harrisburg infested with spotted lanternflies'

If approved, the amendment would block any government entity from imposing new taxes, rules, or regulations on single-use plastics

It's absolutely the wrong direction to be decreasing, rather than increasing, our contributions to environmental programs through the state budget."

Scientists say governments around the world need to quickly and dramatically cut greenhouse gas emissions to keep global warming below 1.5 degrees Celsius -- a threshold seen as necessary to avoid the worst effects of climate change.

PJM is now trying to walk a fine line between respecting states' rights and figuring out how to incorporate their climate polices into its wholesale electricity market.