The federal government will no longer regulate greenhouse gas emissions from major sources like cars, trucks, and power plants, following an announcement Thursday by President Trump and Lee Zeldin, the head of the Environmental Protection Agency. This move effectively dismantles a key pillar of U.S. climate policy.
The administration’s action formally revokes the “endangerment finding,” a crucial legal and scientific justification for regulating emissions of greenhouse gases such as carbon dioxide and methane. Zeldin characterized the decision as “the largest act of deregulation in the history of the United States.”
Environmental groups swiftly condemned the move, warning of dire consequences for public health and the planet. Dr. Gretchen Goldman, CEO of the Union of Concerned Scientists, called it “an obvious example of what happens when a corrupt administration and fossil fuel interests are allowed to run amok.”
Understanding the Endangerment Finding
Approximately 20% of heat-trapping gases released in the United States originate from the exhaust pipes of cars and light trucks. Significant emissions also come from airplanes, power plants, and facilities processing oil and gas. For the past 17 years, the federal government has regulated these emissions to mitigate climate change and reduce risks associated with increasingly severe heat waves, wildfires, droughts, and floods.
These regulations were rooted in a 2009 EPA determination under the Obama administration. The “endangerment finding” concluded that greenhouse gases pose a threat to both public health and general welfare, thereby allowing for regulation under the Clean Air Act.
With Thursday’s announcement, the EPA has eliminated the core justification for regulating these emissions. The reversal began last year when Zeldin announced plans to repeal the rule.
The Administration’s Rationale
Trump’s team argues the endangerment finding imposes unnecessary financial burdens and hinders American energy independence. White House press secretary Karoline Levitt framed the repeal as a cost-saving measure for Americans, estimating potential savings of roughly $1.3 trillion, including over $2,400 on the average new light-duty car, truck, or SUV.
Critics contend that any short-term economic benefits are outweighed by the long-term costs of unchecked climate pollution. Fred Krupp, president of the Environmental Defense Fund, stated, “This action will only lead to more of this pollution, and that will lead to higher costs and real harms for American families.”
According to EPA data previously reported, maintaining Biden-era fuel efficiency and electric vehicle policies would actually result in lower gas prices than revoking them.
Mr. Trump has consistently dismissed concerns about climate change, once calling it a “hoax” despite widespread scientific consensus regarding the role of emissions and the risks of a warming planet.
What Happens Next?
Legal experts point out that the 2009 endangerment finding is firmly grounded in established science and has been upheld by numerous federal court rulings. The Supreme Court has affirmed that greenhouse gases qualify as air pollutants subject to regulation under the Clean Air Act.
This legal precedent makes the Trump administration vulnerable to lengthy legal challenges questioning its authority to overturn the government’s own scientific and statutory conclusions. John Tobin-de la Puente, a business professor at Cornell University’s SC Johnson College, believes companies are unlikely to base long-term plans on this action. “Business operates on a far longer time scale than the four-year cycle of presidential elections, and to rely on the current administration’s announced action would be imprudent, especially given the substantial likelihood that the next administration will once again regulate carbon emissions,” he said.
