Trump Administration Dismantles Key Legal Basis for Climate Regulations
The Biden administration’s efforts to combat climate change faced a significant setback as the Trump administration formally revoked the “endangerment finding,” a crucial scientific determination underpinning federal climate regulations.
On Thursday, the Environmental Protection Agency (EPA) finalized a rule rescinding the 2009 endangerment finding, which established that greenhouse gases like carbon dioxide pose a threat to public health and welfare. This decision, described by President Donald Trump as “the single largest deregulatory action in American history, by far,” eliminates greenhouse gas emissions standards for cars and trucks and potentially opens the door to dismantling broader climate regulations affecting power plants and other pollution sources. Legal challenges are widely anticipated.
EPA Administrator Lee Zeldin characterized the endangerment finding as “the Holy Grail of federal regulatory overreach.” Trump himself dismissed the finding as “one of the greatest scams in history,” falsely claiming it lacked a factual or legal basis. He asserted that fossil fuels have “saved millions of lives and lifted billions of people out of poverty,” a statement that contradicts the overwhelming scientific consensus linking greenhouse gas emissions to increasingly severe climate impacts like heat waves, storms, droughts, and sea level rise.
Environmental organizations condemned the move as the most substantial attack in U.S. history on federal authority to address climate change. They emphasized that the evidence supporting the endangerment finding has only strengthened in the 17 years since its initial approval.
“This action will only lead to more climate pollution, and that will lead to higher costs and real harms for American families,” said Fred Krupp, president of Environmental Defense Fund, adding that the consequences would be felt on Americans’ health, property values, water supply and more. The EPA also announced a proposed two-year delay to a Biden-era rule aimed at restricting greenhouse gas emissions from cars and light trucks, and will discontinue incentives for automakers installing automatic start-stop ignition systems – a feature intended to reduce emissions, but reportedly unpopular with consumers, according to Zeldin.
Zeldin, a former Republican congressman appointed by Trump to lead the EPA, has consistently criticized previous Democratic administrations for what he views as economically damaging climate regulations. He argued that the endangerment finding “led to trillions of dollars in regulations that strangled entire sectors of the United States economy, including the American auto industry,” and that it was used to impose a “left-wing wish list” of policies. He stated the finding “didn’t just regulate emissions, it regulated and targeted the American dream. And now the endangerment finding is hereby eliminated.”
Supreme Court Backing of the Endangerment Finding
The legal foundation of the endangerment finding was affirmed by the Supreme Court in the 2007 case Massachusetts v. EPA, which recognized planet-warming greenhouse gases as pollutants under the Clean Air Act. Since that ruling, courts have consistently rejected legal challenges to the finding, including a 2023 decision by the U.S. Court of Appeals for the District of Columbia Circuit. The endangerment finding is widely considered the cornerstone of regulations designed to mitigate the escalating threats posed by climate change, including deadly floods, extreme heat waves, catastrophic wildfires, and other natural disasters globally.
Gina McCarthy, a former EPA administrator and White House climate advisor under President Biden, labeled the Trump administration’s actions reckless, stating that the EPA is prioritizing the interests of the fossil fuel industry over public health and environmental protection. Former President Barack Obama, via X, asserted that repealing the endangerment finding would compromise the safety, health, and ability of Americans to combat climate change, all to benefit the fossil fuel industry. Dr. Lisa Patel, a pediatrician and executive director of the Medical Society Consortium on Climate and Health, warned that the decision prioritizes the profits of oil and gas companies over clean air, water, and children’s health, potentially leading to increased rates of asthma attacks, premature births, heart attacks, and cancer.
David Doniger, a climate expert at the Natural Resources Defense Council, suggested that Trump and Zeldin intend to use the repeal as a “kill shot” to invalidate nearly all existing climate regulations. The move could eliminate current limits on greenhouse gas pollution from various sources, including cars, factories, and power plants, and impede future administrations’ ability to address global warming. The EPA’s action stemmed from an executive order issued by Trump directing the agency to assess the “legality and continuing applicability” of the endangerment finding.
Conservative groups and some Republican lawmakers have long sought to overturn what they perceive as overly restrictive and economically damaging regulations aimed at limiting greenhouse gas emissions. Myron Ebell, a conservative activist skeptical of climate science, hailed the withdrawal of the endangerment finding as “the most important step taken by the Trump administration so far to return to energy and economic sanity.”
The administration, alongside Transportation Secretary Sean Duffy, is also moving to significantly weaken tailpipe emission standards for cars and trucks, reversing rules implemented under President Biden that encouraged the development and sale of electric vehicles. The transportation sector remains the largest source of greenhouse gas emissions in the U.S. In December, the Trump administration proposed loosening vehicle mileage rules, reducing regulatory pressure on automakers to control pollution from gasoline-powered vehicles. The EPA stated that the two-year delay to the Biden-era rule will allow time to develop a plan that reflects slower EV sales and promotes consumer choice and affordability. Environmental groups argue this will prolong the use of polluting vehicles, endangering public health, particularly for children and the elderly.
