Washington, United States (AFP) – The US Supreme Court declined on Friday to block environmental regulations aimed at reducing harmful emissions of mercury from power plants and methane from oil and gas facilities.

The court, without comment, rejected a request by industry groups and Republican state attorneys general who had asked for the Environmental Protection Agency (EPA) rules to be put on hold while litigation continues in lower courts.

The EPA regulations, brought under the Clean Air Act, are designed to limit emissions of mercury and other toxic air pollutants from coal-fired power plants and curb emissions of methane — a super-pollutant greenhouse gas — from oil and gas facilities.

They are being challenged by power and mining companies and oil and gas firms who contend they are unnecessary and costly.

The nonprofit National Resources Defense Council (NRDC) welcomed the Supreme Court move allowing the EPA rules to remain in place for now.

“The Supreme Court has sensibly rejected two efforts by industry to halt critical safeguards,” David Doniger, a senior attorney at the NRDC, said in a statement.

“For far too long, oil and gas producers have been allowed to ignore the leaks in their own equipment and let dangerous methane and smog-forming compounds pollute our air,” Doniger said.

In June, the Supreme Court temporarily blocked the implementation of an EPA measure aimed at curbing air pollution that drifts across state lines from facilities like power plants.

The “good neighbor” plan would not have taken effect until 2026, but a series of states and companies requested that it be blocked now while litigation against it plays out in a lower court — a request the Supreme Court granted in a 5-4 decision.

The court’s decision to temporarily block the plan was the third time in recent years that it has curbed the EPA’s powers, after it dealt a blow to the agency’s authority to regulate wetlands in 2023 and greenhouse gases in 2022.

cl/bfm

© Agence France-Presse

Featured image credit: Tim Mossholder | Unsplash

Fire globe - abstract (s. climate, temperatures, forever chemicals, wildfires)
Chile declares emergency as wildfires kill at least 19News

Chile declares emergency as wildfires kill at least 19

Penco, Chile | AFP Uncontrolled wildfires tore through communities in southern Chile, leaving charred ruins in their wake and at least 19 dead, authorities said, announcing…
SourceSourceJanuary 19, 2026 Full article
Image: banana fiber
Composites are going low-carbonNews

Composites are going low-carbon

Researchers at EPFL and its startups are exploring innovative composites that are self-repairing, self-curing and reusable, in an effort to help drive the transition to…
SourceSourceJune 4, 2025 Full article
Image: Krasnoyarsk Pillars National Park (s. Siberia, climate change)
Thawing permafrost dots Siberia with rash of moundsNews

Thawing permafrost dots Siberia with rash of mounds

Churapcha, Russia | AFP Record mild weatherViruses and bacteria In the vast white expanse around Churapcha in eastern Siberia, the ever more rapid thaw of…
SourceSourceApril 30, 2025 Full article