(The Hill) – The Supreme Court on Thursday curbed the Environmental Protection Agency’s (EPA’s) ability to regulate climate change, setting limits on how the agency can deal with power plants.

In a 6-3 ruling, the justices determined that Congress did not authorize the EPA to induce a shift toward cleaner energy sources using the approach that an Obama-era regulation sought to.

“Congress did not grant EPA…the authority to devise emissions caps based on the generation shifting approach the Agency took in the Clean Power Plan,” the majority wrote, referring to an Obama-era power plant regulation.

The ruling was split along ideological lines, with its conservative justices opting to restrict the EPA’s power while the liberal justices disagreed.

At issue in the case was language in the Clean Air Act that enables EPA to regulate power plants using a “best system of emissions reduction” and what specifically that system can entail.

“From Superstorm Sandy to Hurricane Ida, New Yorkers know all too well that the climate crisis is already here. We have no time to waste in our fight to cut carbon emissions and build a clean energy economy.

Make no mistake: today’s decision by the Supreme Court is a major setback in our fight against climate change. By limiting the Environmental Protection Agency’s ability to protect our environment, the Court is taking away some of the best tools we have to address the climate crisis. It presents three immediate priorities: The EPA must swiftly implement the strongest possible new emissions rule, States must redouble our climate efforts, and Congress must pass robust climate legislation this year to allow us to go further, faster.

New York is once again in the familiar, but unwelcome, position of stepping up after the Supreme Court strikes a blow to our basic protections. But as always, New York is ready. We will strengthen our nation-leading efforts to address the climate crisis, redouble efforts with sister states, build new clean energy projects in every corner of the state, and crack down on pollution harming the health of many New Yorkers. After this ruling, our work is more urgent than ever.”

New York Governor Kathy Hochul

The majority opinion, penned by Chief Justice John Roberts, determined that the Obama administration’s use of a system that involved moving away from carbon-intensive coal plants and toward natural gas and renewables did not qualify.

Roberts wrote that the plan, which involved regulating the power system as a whole instead of regulating individual plants, was an “unprecedented” view of the EPA’s authority that involved a “fundamental revision of the statute, changing it from [one sort of] scheme of . . . regulation” into an entirely different kind.

In Thursday’s ruling, the court took a regulatory tool off the table for the Biden administration, which is currently working on its own power plant regulations.

Legal experts recently told The Hill that preventing the EPA from using certain climate tools could result in regulations that allow more planet-warming emissions overall.

Justice Elena Kagan, writing a dissent for the three liberal justices on Thursday, said the majority was constraining the federal government’s ability to address carbon emissions during a time of crisis.

“The subject matter of the regulation here makes the Court’s intervention all the more troubling,” Kagan wrote. “Whatever else this Court may know about, it does not have a clue about how to address climate change. And let’s say the obvious: The stakes here are high. Yet the Court today prevents congressionally authorized agency action to curb power plants’ carbon dioxide emissions.

“The Court appoints itself—instead of Congress or the expert agency—the decision-maker on climate policy. I cannot think of many things more frightening.”

While the majority tailored its ruling to the challenge against the EPA’s authority, the decision could have implications for other administrative agencies, with the newly emboldened conservative wing indicating it will be skeptical of any broad interpretations of regulatory authority delegated by Congress.

The liberal justices accused the majority of straying from their own principles in interpreting legislative text in order to deal a blow to environment regulators. In her dissent, Kagan mentioned a 2015 speech she gave in which she said, “We’re all textualists now.”

“It seems I was wrong,” Kagan wrote on Thursday. “The current Court is textualist only when being so suits it.”