US President Donald Trump has rescinded a cornerstone environmental ruling from the Barack Obama administration, dismantling a key component of America’s federal climate policy.
The move, announced alongside Environmental Protection Agency (EPA) Administrator Lee Zeldin, abolishes the 2009 “endangerment finding” that identified greenhouse gases (GHGs) as a threat to public health.
The Obama-era finding served as the legal basis for a wide range of emission control measures, particularly those imposed on vehicle manufacturers.
Its reversal marks one of the most consequential rollbacks of environmental policy under the Trump administration.
Trump said the original decision hindered domestic industry and imposed unnecessary costs on consumers and automakers, asserting that its cancellation will streamline regulations and support economic growth.
He projected that the decision would remove more than $1.3 trillion in regulatory costs and substantially lower vehicle prices.
According to the White House, the reversal is expected to cut automobile costs by about $2,400 per vehicle for manufacturers, the BBC reported.
The president described the 2009 rule as a damaging policy that had “negatively impacted the US automotive industry and increased consumer costs”.
Administration officials argue that eliminating the finding will save over $1 trillion and reduce energy and transportation expenses for households and businesses.
The EPA’s original determination, signed in December 2009 during Obama’s first year in office, classified six greenhouse gases (including carbon dioxide, methane, and nitrous oxide) as pollutants threatening human health and welfare.
That finding became critical when Congress stalled on comprehensive climate legislation, enabling the EPA to regulate emissions under existing laws such as the Clean Air Act.
Environmental advocates reacted strongly to the announcement, describing it as a severe setback to the nation’s climate commitments.
Several organisations have already signalled intentions to challenge the decision in court, warning that it could undermine decades of environmental progress.
Critics also expressed concern that overturning the rule may weaken US credibility in global climate negotiations and encourage higher emissions from vehicles and power plants.
Industry supporters, however, welcomed the administration’s decision.
American Energy Alliance President Tom Pyle said: “Since its inception, the Endangerment Finding has been weaponised against projects and goods that deliver affordable, reliable energy to the American people.
“It has affected investment and infrastructure decisions in ways that have harmed US competitiveness, purely to advance a political ideology.
“Rescinding the rule is an opportunity to reset policy, respect congressional intent, and ensure that any future framework is debated and decided by the people’s actual elected representatives.”
Despite the administration’s assurances of economic benefits, environmentalists and policy analysts cautioned that the rollback could yield unintended consequences.
They warn that reduced regulatory oversight may delay the nation’s adaptation to clean technologies and exacerbate climate‑related risks, from extreme weather to public health impacts.
As legal challenges loom, the fate of federal climate policy may again rest with the courts, echoing a familiar political and environmental battle that has shaped Washington’s climate agenda for more than a decade.
