This is one step toward neutering agencies and their unelected bureaucrats.

"...the “major-questions” doctrine – the idea that if Congress wants to give an administrative agency the power to make “decisions of vast economic and political significance,” it must say so clearly. Roberts’ full-throated embrace of the major-questions doctrine – a judicially created approach to statutory interpretation in challenges to agency authority – likely will have ripple effects far beyond the EPA. His reasoning applies to any major policymaking effort by federal agencies."

https://www.scotusblog.com/2022/06/supreme-court-curtails-epas-authority-to-fight-climate-change/