The Supreme Court left in place Friday two Biden administration environmental regulations aimed at reducing industry emissions of planet-warming methane and toxic mercury.
The justices did not detail their reasoning in the orders, which came after a flurry of emergency applications to block the rules from industry groups and Republican-leaning states. There were no noted dissents.
The high court is still considering challenges to a third Environmental Protection Agency rule aimed at curbing planet-warming pollution from coal-fired power plants.
The regulations are part of a broader effort by the Biden administration aimed at curbing climate change that includes financial incentives to buy electric vehicles and upgrade infrastructure, and rules tightening tailpipe pollution standards for cars and trucks.
The industry groups and states had argued the EPA overstepped its authority and set unattainable standards with the new regulations. The EPA, though, said the rules are squarely within its legal responsibilities and would protect the public.
An EPA spokesperson said Friday the agency is pleased that the Supreme Court denied applications to stay the final methane and mercury rules. EPA believes the rule tightening methane emissions from oil and gas drilling will deliver major climate and health benefits for all Americans, while the mercury rule will limit hazardous pollution from coal-fired power plants, spokesperson Remmington Belford said.
The methane rule will build on innovative technologies and solutions that many oil- and gas-producing states and companies are already using or have committed to use, while the mercury and air toxics rule “will ensure that the nation’s coal-fired power plants meet up-to-date standards for hazardous air pollutants,” Belford said.
Both rules are firmly grounded in the EPA’s authority under the Clean Air Act, he said. The Supreme Court has shot down other environmental regulations in recent years, including a landmark decision that limited the EPA’s authority to regulate carbon dioxide emissions from power plants in 2022, and another that halted the agency’s air-pollution-fighting “good neighbor” rule.
The methane rule puts new requirements on the oil and gas industry, which is the largest emitter of the gas that’s a key contributor to climate change. A lower court previously refused to halt the regulation.
Methane is the main component in natural gas and is far more potent than carbon dioxide in the short term. Sharp cuts in methane emissions are a global priority — including the United States — to slow the rate of climate change.
The methane rule targets emissions from existing oil and gas wells nationwide, rather than focusing only on new wells. It also regulates smaller wells that will be required to find and plug methane leaks.
Studies have found that smaller wells produce just 6% of the nation’s oil and gas but account for up to half the methane emissions from well sites. The plan also calls for a phased-in requirement for energy companies to eliminate routine flaring, or burning of natural gas that is produced by new oil wells.
The states challenging the rule called the new standards “impossible to meet” and said they amounted to an “attack” on the industry.
The mercury rule, meanwhile, came after a reversal of a move by the Trump administration. It updated regulations that were more than a decade old for emissions of mercury and other harmful pollutants that can affect the nervous system, kidneys and fetal development.
Industry groups and conservative-leaning states argued emissions were already low enough, and the new standards could force the shuttering coal-fired power plants.
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