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 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 lawmakers proposed another $500 million plan to subsidize the state’s nuclear industry and fought back against critics of providing support.

Pennsylvania lawmakers must approve nuclear subsidies by May to prevent the retirement of Three Mile Island Unit 1, Exelon CEO Chris Crane said.

The closure of four nuclear plants in Pennsylvania and Ohio would boost power prices and carbon emissions, undoing the clean air benefits of renewables, according to a Brattle Group report.

Exelon announced that it will retire Three Mile Island Unit 1 in September 2019 “absent needed policy reforms.”