Calling it the “biggest deregulatory action in U.S. history,” the Environmental Protection Agency rolled out sweeping moves Wednesday aimed at walking back environmental protections and eliminating a host of climate change regulations, some decades in the making.
Taken together, the agency’s actions indicate a wholesale reorientation of the agency away from government support of renewable energy, carbon reduction programs and air, water and soil regulations while threatening to gut the government’s past scientific findings at the core of most climate regulations.
EPA Administrator Lee Zeldin rolled out over two dozen policy announcements, through a series of press releases and public statements. The list of proposed changes includes rolling back emission regulations on coal, oil and gas production and a promise to work across the federal agencies to reevaluate the government finding that determined that greenhouse gas emissions, such as carbon dioxide and methane, not only heat the planet but are a threat to public health.
EPA Administrator Lee Zeldin speaks in East Palestine, Ohio, Feb. 3, 2025.
Rebecca Droke, Pool via Reuters, FILE
“We are driving a dagger straight into the heart of the climate change religion to drive down cost of living for American families, unleash American energy, bring auto jobs back to the U.S. and more,” Zeldin wrote in a statement on EPA’s website.
The backlash from the environmental community was swift.
“If they get their way, they will wreck our air, our water, burn down our homes, and hand future generations an unlivable climate. From moms in the 1970s who wanted their kids to be able to play outside without getting asthma to young people in the 2020s who went on hunger strike to force Congress to pass a climate bill, generations of Americans have fought and sacrificed for these regulations,” the youth-led climate advocacy group Sunrise Movement wrote in response.
“Corporate polluters are celebrating today because Trump’s EPA just handed them a free pass to spew unlimited climate pollution, consequences be damned. The Biden administration put the first-ever carbon limits on dirty coal and gas plants, cutting toxic air pollution, saving lives, and avoiding $270 billion in climate damages. Rolling back these protections is a direct attack on the communities that have been forced to breathe toxic air from polluting plants for decades,” climate advocacy organization Evergreen Action Senior Power Sector Policy Lead Charles Harper wrote in a statement.
The Environmental Protection Agency (EPA) headquarters is shown in Washington, D.C., on Feb. 18, 2025.
Bonnie Cash/UPI via Shutterstock
Changes to the rules and regulations announced Wednesday will still have to go through the federal regulatory process and will likely have to stand up to numerous court challenges from environmental groups. However, today’s flurry of actions makes good on the president’s campaign promises to gut many of the long-established rules and regulations initially created to protect our water, air, soil and human health.
Endangerment finding
One of the most significant announcements was that the EPA would engage in the”formal reconsideration” of the agency’s endangerment finding.
In 2009, the EPA issued an “endangerment finding” determining that greenhouse gases, including carbon dioxide, methane, and others, pose a danger to public health and the environment. This ruling, prompted by the 2007 Supreme Court decision in Massachusetts v. EPA, gave the EPA the legal authority to regulate these emissions under the Clean Air Act (CAA).
This finding represents the legal underpinning for many regulations concerning greenhouse gas emissions, including emissions standards for vehicles, power plants and oil and gas production — all of which Zeldin said the agency would also reevaluate as it reconsiders the finding.
If the Trump Administration decides the endangerment finding is no longer applicable and that determination survives court challenges, 16 years’ worth of emissions regulations, including those enacted under President Biden, could be jeopardized.
Vehicle emissions standards
Zeldin also took aim at Biden-era vehicle standards, saying the EPA would terminate the tailpipe emissions regulations announced by the previous administration last year.
While the Trump Administration has repeatedly referred to these standards as an EV “mandate”, there was no such mandate put in place by the Biden administration.
The Biden Environmental Protection Agency implemented tailpipe emissions standards last March that established an average of allowed emissions across a vehicle manufacturer’s entire fleet of offered vehicles. The standards would have only impacted cars from model years 2027 to 2032 and allowed for a range of usable technologies, including fully electric cars, hybrids and improved internal combustion engines. These standards applied to light and medium-duty vehicles. A separate set of standards were released for heavy-duty vehicles.
As Zeldin’s EPA announced reconsideration of these standards, it released a statement saying, the regulations imposed, “$700 billion in regulatory and compliance costs,” alleging they took away, “Americans’ ability to choose a safe and affordable car for their family and increases the cost of living on all products that trucks deliver.”
Impacts on coal
Another of the policies being reconsidered is the “Clean Power Plan 2.0,” which targets emissions from coal and natural gas power plants.
In this May 4, 2021, file photo, people fish along the Texas City Dike across from the refineries inside the Texas City industrial complex, including Marathon and Valero, in Texas City, Texas.
Mark Mulligan/Houston Chronicle via Getty Images, FILE
At the time, the agency claimed the new regulations would represent a massive reduction in pollution and save hundreds of billions of dollars in climate and public health costs as it would force power plants to control 90% of their carbon pollution through methods like carbon capture and tightened the emissions standards for toxic metals like mercury that are released from coal-fired plants.
In one of many press releases sent on Wednesday, the EPA called the rules “overreaching” and “an attempt to shut down affordable and reliable electricity generation in the United States, raising prices for American families, and increasing the country’s reliance on foreign forms of energy.”
Social cost of carbon
Also among the 31 actions announced by the agency is a revisiting of the “social cost of carbon,” with Zeldin saying the previous administration used the metric to “advance their climate agenda in a way that imposed major costs.”
In 2010, the EPA under then-President Barack Obama released its first estimate for what it called the “social cost of carbon,” or SC-CO2. This metric meant to capture in dollars the long-term damage created by carbon dioxide emissions each year.
It estimated, in effect, the cost of damages related to climate change, including changes in agricultural productivity, human health, property damages from added flood risk, changes in energy costs and other considerations.
The Biden Administration later updated the estimate process to include consideration of additional factors, leading to an increase in the national SC-CO2. In December 2023, the Biden EPA updated the metric at a dramatically higher rate — $190 per ton of carbon, compared to the administration’s earlier estimate of $51 per ton.
“To Power the Great American Comeback, we are fully committed to removing regulations holding back the U.S.,” Zeldin said in the announcement.