Talen Energy agreed to pay a $1 million fine after toxic waste from its Brunner Island plant seeped into groundwater and the nearby Susquehanna River.

Pennsylvania Senate Minority Leader Jay Costa wants other lawmakers to sign onto his plan to cap energy sector emissions.

Three nuclear plants facing early retirements in Pennsylvania and Ohio would keep consumer costs lower if they stay online, PJM concluded.

Landowners united against Transource Energy's Independence Energy Connection said they doubt an alternate plan would be more costly, as PJM says.

An attempt to save Pennsylvania’s Three Mile Island fell apart, but that doesn’t mean state lawmakers will abandon support for nuclear subsidies altogether.

Exelon announced it will permanently shut down the nearly 45-year-old Three Mile Island nuclear plant in Londonderry Township, Pa., by Sept. 30.

The fate of Three Mile Island looks bleaker as Pennsylvania lawmakers wrapped up hearings that considered subsidizing the state’s nuclear fleet.

Pennsylvania Democrats want to nearly quadruple renewable subsidies in the state’s Alternative Energy Portfolio Standards mandate.

Pennsylvania joined the U.S. Climate Alliance after releasing its own action plan to achieve a 26% reduction in statewide greenhouse gas emissions by 2025.

Pennsylvania senators waded into the debate over subsidizing the state’s nuclear fleet, questioning owners’ need for a legislative solution.