Energy

The plant, Clairton Coke Works, is one of four major plants in Pennsylvania owned by U.S. Steel, an icon of the domestic steel industry and American industrialization.

Allegheny County Emergency Services said a fire at the plant in Clairton started late Monday morning. Officials said they had not isolated the cause of the blast.

An extreme June heat wave that prompted a heat health emergency declaration killed five people in the city and had been made four times more likely by climate change.

It’s not clear that any state has a solution and the actual effect of data centers on electricity bills is difficult to pin down.

Tech companies are building huge data centers to power their AI supercomputers that use enormous amounts of energy. What does this mean for consumers and the environment?

More than 3.5 million acres had been designated wind energy areas.

Limited assistance plagues Delawareans seeking utility assistance. But new laws could help avoid shutoffs.

The program is geared toward customers with incomes too high to qualify for some existing energy assistance programs.

Residential solar tax credits were supposed to last for another decade. The Dec. 31 deadline has homeowners rushing to install and get their systems online.

An investor owned firm says its proposed Delaware City data center will bring jobs. Residents say it will use too much energy and water.

The auction, meant to ensure sufficient power supply in the future, closed at a record price for the second year in a row.

Three nonprofits hope to force the federal government to regulate hydrogen fluoride more strictly. The chemical is still used at a Delaware County refinery.

Trump traveled to Pittsburgh at a summit helmed by Republican Sen. David McCormick that included dozens of top executives.

PGW sought emails, texts and memos from climate groups that are participating in its ratemaking case. The PUC ruled that would violate the First Amendment.

The multimillion-dollar experiment that was years in the making comes as the federal government makes broad cuts to science elsewhere.