California Attorney General Rob Bonta has filed a lawsuit challenging the U.S. Environmental Protection Agency's rescission of power plant emissions rules, escalating the legal fight over federal air quality regulation affecting the energy sector.

Bonta did not mince words in announcing the suit. "President Trump remains hell-bent on protecting the pockets of the fossil fuel industry," the attorney general said in a statement accompanying the filing.

The lawsuit targets the EPA's decision to scrap emissions rules governing power plants — a regulatory framework that had set compliance obligations for utilities and generation facility operators across the country. California's challenge adds the state to the growing roster of jurisdictions contesting the rollback in court.

The rescission matters directly for the waste and recycling sector in several respects. Scrap metal processors supply ferrous and nonferrous feedstock to electric arc furnace steelmaking, an industry whose economics shift with the regulatory burden placed on coal-fired generation competitors. Energy-from-waste facilities, which operate under emissions permitting regimes, also face a changed compliance picture when federal power plant rules are withdrawn.

California has consistently used its attorney general's office as a regulatory backstop against federal rollbacks during the Trump administration, filing numerous suits over emissions standards, fuel economy rules, and air quality enforcement. This latest action follows that pattern, aiming to preserve emissions controls through judicial review of agency decision-making.

The core legal question in the case is whether the EPA followed proper administrative procedure in rescinding the rules, and whether the withdrawal itself is arbitrary and capricious under the Administrative Procedure Act. Challengers in similar cases have argued that agencies cannot unwind regulations without a reasoned explanation that withstands judicial scrutiny.

A victory for California and allied challengers would restore the emissions rules and their associated compliance deadlines for power plant operators. A loss would leave the rollback in place unless Congress or a subsequent administration reverses course.

The litigation now moves to briefing in federal court, where the timeline for a ruling on the merits — or a preliminary injunction sought by the challengers — will determine whether the rescinded rules regain force. The next milestone to watch: the court's decision on whether to stay the rescission while the case proceeds.