Overview

The Administration's View of Environmental Regulation

The administration's case rests on two related propositions: that federal environmental regulation grew too costly and too expansive under prior administrations, particularly under President Biden, and that deregulation will lower costs for industry, consumers, and households. On January 31, 2025, President Trump issued an executive order requiring federal agencies to eliminate ten existing regulations for each new one implemented. The order, framed under the banner of "Unleashing American Energy," treated environmental rules primarily as economic burdens rather than public goods.

EPA Administrator Lee Zeldin has articulated a parallel redefinition of the agency's mission. Zeldin has described his job as being to "lower the cost of buying a car, heating a home, and running a business," a formulation that critics note omits the toll that industrial pollution takes on health and household budgets. The administration has proclaimed that its deregulatory efforts will "roll back trillions in regulatory costs," a framing that independent analysts say ignores the benefits those regulations deliver to the public. This cost-only accounting is the administration's stated rationale; whether it constitutes an accurate picture of net economic effects is a contested empirical question.

What Rules and Protections Have Changed?

The volume of regulatory action has been extraordinary. EPA Administrator Zeldin announced in March 2025 that the agency would review 31 regulatory actions for possible rollback. What followed was a cascade of simultaneous proposals and finalizations across air, water, and climate domains. The administration announced a wave of rollbacks including a repeal of Biden-era emissions limits on power plants and automobiles, as well as reduced protections for waterways, in alignment with the president's vows to slash regulations to boost industries from coal to manufacturing.

The single most consequential action came in February 2026. The EPA finalized a rule rescinding the 2009 "endangerment finding" — the legal underpinning for nearly all climate regulations under the Clean Air Act for motor vehicles, power plants, and other pollution sources — which had established that carbon dioxide and other greenhouse gases threaten public health and welfare. EPA Administrator Zeldin called the repeal of the endangerment finding "the single largest deregulatory action in the history of the United States."

On water, the EPA proposed a rule that sharply narrows which wetlands and streams are protected under the Clean Water Act. Separately, proposed changes to coal ash pollution safeguards would exempt more than 100 ash dumps from federal cleanup rules, roll back groundwater monitoring requirements, and weaken oversight of one of the nation's largest toxic waste streams. On public lands, the USDA revised regulations governing National Forest System oil and gas resources, consolidating the Forest Service and Bureau of Land Management's environmental review processes with the stated goal of improving efficiency and accelerating permitting.

Structural changes have compounded the regulatory rollbacks. Thousands of EPA staff — possibly as much as 33 percent of the workforce — have quit or been fired since the second inauguration, and the White House has sought to slash EPA's budget by roughly 55 percent, which would leave the agency with funding levels not seen in four decades. The administration also canceled or clawed back billions of dollars in spending for the environment and clean energy, while Congress repealed most of the Inflation Reduction Act, eliminating future funding and phasing out key tax credits.

Economic Costs Versus Environmental Costs

The administration's case for deregulation is strongest when applied to specific rules that were poorly calibrated or imposed disproportionate compliance costs on small producers. Critics of the Biden-era regulatory posture had credible grounds to argue that some rules were issued too quickly or relied on cost-benefit analyses that overstated benefits. However, the current program does not appear to be a selective correction of poorly designed rules; it is a comprehensive withdrawal from entire regulatory domains.

The administration has moved rapidly to weaken or repeal significant regulations that protect human health and the environment, improve energy efficiency for consumer products, and limit emissions of climate-warming pollution, while its stated rationale presents this as an economic benefit and ignores the benefits those regulations deliver to Americans. Independent trackers, including the Institute for Policy Integrity at New York University Law School, have attempted to estimate the annualized public-health and economic losses from specific rollbacks, though such estimates are inherently uncertain and contested.

Repealing IRA clean-energy incentives was projected to increase household electricity costs by more than $110 in 2026, threaten more than $500 billion in planned economic investment, and lead to roughly one million fewer jobs in 2030 compared to a scenario in which the law remained intact. These projections, from the Center for American Progress, are disputed by administration supporters who argue the IRA overallocated subsidies to preferred industries. The underlying point — that regulatory costs and benefits must both be counted — is not seriously disputed among economists.

Climate Policy and the Treatment of Scientific Evidence

The rescission of the endangerment finding is unusual not only for its scope but for its evidentiary claims. A former acting deputy EPA administrator has noted that the attempted repeal of the endangerment finding during the first Trump administration was unsuccessful because the EPA could not make a strong science case for it, and that the current research supporting the link between greenhouse gases and climate harm is even stronger than it was then. The 2026 repeal does not appear to rest on new scientific evidence refuting the 2009 finding; rather, the administration has argued on legal and statutory grounds that the Clean Air Act does not authorize the type of regulation the finding supports.

A Supreme Court ruling could take Clean Air Act climate regulation off the table permanently. If the high court accepted EPA's argument that the agency lacks authority to regulate greenhouse gases because climate pollution does not endanger the public through direct exposure, that could end carbon regulation under the statute. Separately, under the 2025 rollbacks, federal agencies are no longer required to fully assess climate impacts, cumulative pollution, or environmental justice concerns when approving oil, gas, and mining projects, and scientific analysis has been treated as optional rather than essential. The administration has also tried to eliminate research grants to universities on energy and climate.

Effects on States, Communities, and Public Health

The consequences of the deregulatory program are unevenly distributed. States with strong independent environmental agencies — California, New York, Massachusetts — have moved to maintain or extend state-level protections and have filed legal challenges to federal rollbacks. States with weaker environmental programs or legislatures hostile to regulation are likely to see the largest practical gaps in protection. The shift of regulatory burden from the federal government to state governments is a predictable structural effect of the administration's approach, but states vary widely in their capacity and willingness to fill that gap.

Communities across the country had been relying on $37 billion in promised EPA grants from congressionally mandated programs; so far, $29 billion of those grants have been unlawfully canceled or frozen, according to NRDC, with the fate of billions more uncertain. Denying states, cities, and communities funds to implement projects that reduce pollution and energy costs puts public health and jobs at risk while driving up household energy bills.

Accelerated oil and gas permitting on National Forest System lands will likely lead to a cumulative increase in emissions and adverse consequences to ecosystem health, wildlife, and public health, as well as decreased carbon sequestration capacity on forested land, according to analysts at Columbia University's Climate Law Blog. Courts have not been uniformly deferential to the administration's rollbacks. The D.C. Circuit Court of Appeals upheld the 2024 national air quality standard for soot, rejecting the Trump administration's decision to abandon that clean air standard, illustrating that legal checks on the program remain operative.

The Test of Environmental Stewardship

The administration's claim to responsible stewardship rests on the argument that prior regulations were economically irrational and that the market, supplemented by targeted state-level rules, can manage pollution more efficiently than federal mandates. That argument has real intellectual content in limited domains. Where it is weakest is in addressing pollution whose costs are diffuse, cumulative, long-delayed, or cross-jurisdictional — precisely the categories that federal environmental law was designed to handle and that market mechanisms historically have not resolved on their own.

What is established: the administration has enacted the largest rollback of federal environmental regulation in modern American history in a compressed timeframe, affecting greenhouse gas standards, air and water quality rules, public lands management, and agency funding and staffing. What is genuinely disputed: whether the net economic effect of the deregulatory program, accounting for both compliance cost reductions and lost public health and climate benefits, is positive or negative. What remains untested: the durability of these rollbacks in the courts. The revocation of the endangerment finding, if it survives, would undo the legal grounds for carbon dioxide and methane standards for motor vehicles, utilities, oil and gas production, and large industrial sources — and such an effort will certainly end up in court. The administration has moved with speed and ambition, but legal challenges are ongoing, and the Supreme Court's ultimate disposition of the underlying statutory questions will shape how much of this agenda endures.