The Environmental Protection Agency (EPA) has officially announced the repeal of the 2009 Endangerment Finding, a move that effectively strips the federal government of its primary legal mechanism for regulating greenhouse gas emissions. The decision, spearheaded by EPA Administrator Lee Zeldin, has ignited a firestorm of criticism from environmental organizations, scientific bodies, and the outdoor recreation industry. Protect Our Winters (POW), a leading advocacy group representing the "Outdoor State," has responded by calling for Zeldin’s immediate resignation, characterizing the repeal as a dereliction of the agency’s core mission to protect human health and the environment.
The Endangerment Finding serves as the scientific and legal cornerstone of federal climate policy. By rescinding it, the EPA has essentially signaled that it no longer recognizes greenhouse gas pollution as a threat to public welfare, a stance that contradicts decades of peer-reviewed climate science and recent meteorological data. The repeal is expected to trigger a cascade of legal challenges and a significant shift in how the United States manages air quality and carbon output.
The Legal and Historical Context of the Endangerment Finding
To understand the magnitude of the EPA’s recent action, one must look back to the landmark 2007 Supreme Court case, Massachusetts v. EPA. In that ruling, the Court determined that greenhouse gases (GHGs) fit the definition of "air pollutants" under the Clean Air Act. Consequently, the Court mandated that the EPA determine whether these pollutants endangered public health or welfare.
In December 2009, following an exhaustive review of scientific evidence, the EPA issued the Endangerment Finding. It concluded that the atmospheric concentrations of six key greenhouse gases—carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, perfluorocarbons, and sulfur hexafluoride—threatened the public health and welfare of current and future generations. This finding was not merely a symbolic gesture; it was a legal trigger that required the EPA to regulate GHG emissions from motor vehicles and, eventually, stationary sources like power plants.
For fifteen years, the Endangerment Finding survived numerous court challenges and administrative shifts, serving as the bedrock for the Clean Power Plan, fuel efficiency standards, and various methane reduction rules. The repeal of this finding represents a fundamental reversal of federal policy, effectively removing the "teeth" from the Clean Air Act’s application to climate change.
The 2025 Deregulatory Agenda and the Call for Resignation
Since taking office in January 2025, Administrator Lee Zeldin has overseen an aggressive campaign to roll back environmental protections. Critics argue that the agency has shifted from a regulatory body to an instrument of the fossil fuel industry. The repeal of the Endangerment Finding is viewed by many as the culmination of this effort.
Protect Our Winters, in its formal statement, argued that the EPA under Zeldin has become an "active participant" in dismantling the nation’s environmental safeguards. The organization’s call for Zeldin’s resignation is based on the premise that the agency can no longer fulfill its mandate if it ignores the foundational science of climate change.
"An EPA that ignores science and dismantles the tools designed to protect public health and the environment cannot fulfill its mission," the organization stated. "Administrator Zeldin has overseen the systematic unraveling of environmental protections while climate impacts mount."
The call for resignation is echoed by various stakeholders in the "Outdoor State," a demographic comprising 181 million Americans who participate in outdoor recreation. This group argues that the EPA’s current trajectory poses an existential threat to the $1.2 trillion recreation economy, which relies on stable climates, clean water, and predictable winter seasons.
Scientific Realities: The "Snow Drought" of the American West
The EPA’s policy shift comes at a time when the physical impacts of climate change are becoming increasingly visible, particularly in the American West. Meteorological data from the current winter season indicates a severe "snow drought" across several states, including California, Colorado, Utah, and Washington.
Scientific measurements and satellite imagery show that winter snowpack levels are at historically low levels for this time of year. This phenomenon is not necessarily caused by a lack of precipitation, but rather by "unusually warm temperatures" that cause precipitation to fall as rain instead of snow. When rain falls on existing snow (a "rain-on-snow" event), it accelerates melting, leading to premature runoff and reduced storage in high-altitude snowpacks.
The implications of a diminished snowpack extend far beyond the ski industry. In the Western United States, mountain snowpack acts as a natural reservoir, storing water during the winter and releasing it slowly throughout the spring and summer. This cycle is critical for:
- Agriculture: Providing a steady water supply for irrigation in regions that produce a significant portion of the nation’s produce.
- Hydropower: Ensuring consistent river flow to turn turbines and generate carbon-free electricity.
- Wildfire Mitigation: Maintaining moisture levels in forests to prevent the early onset of fire seasons.
- Ecosystem Health: Supporting salmon runs and other aquatic life that depend on cold, oxygenated water.
By repealing the Endangerment Finding, the EPA is effectively withdrawing from its role in mitigating the emissions that drive these temperature increases, leaving western states to manage the fallout with fewer federal resources.
Economic Implications for the $1.2 Trillion Outdoor Economy
The outdoor recreation industry has evolved into a major economic driver in the United States, surpassing sectors such as motor vehicle manufacturing and air transportation in terms of GDP contribution. According to data from the Bureau of Economic Analysis (BEA), the outdoor recreation economy accounts for approximately 2.2% of the total U.S. GDP.
The stability of this economy is inextricably linked to the environment. In rural communities across the Rockies and the Sierras, winter tourism is the primary source of revenue. A "thin" snowpack leads to shorter seasons, reduced hotel occupancy, and lower tax revenues for local governments. Furthermore, the lengthening of wildfire seasons—a direct result of early snowmelt—threatens summer recreation, leading to trail closures and health advisories due to smoke.
Protect Our Winters highlights that the 181 million Americans who recreate outdoors represent a powerful political and economic bloc. For these individuals, the repeal of the Endangerment Finding is not a distant policy debate but a direct threat to their livelihoods and lifestyles. The organization argues that prioritizing short-term fossil fuel interests over the long-term viability of the recreation sector is an economically unsound strategy.
Chronology of Recent EPA Actions (January – May 2025)
The repeal of the Endangerment Finding is the latest in a series of actions taken by the EPA since the start of the 2025 administrative term. A timeline of these events illustrates a consistent pattern of deregulation:
- January 2025: The EPA announces a "comprehensive review" of all climate-related regulations, signaling a pause in the enforcement of methane leak detection for oil and gas infrastructure.
- February 2025: The agency moves to weaken tailpipe emission standards for light-duty vehicles, arguing that the previous standards were "technologically unfeasible" and overly burdensome for manufacturers.
- March 2025: Administrator Zeldin signs a memorandum prioritizing "energy independence" over carbon sequestration goals, effectively de-funding several carbon capture research initiatives.
- April 2025: The EPA proposes revisions to the Lead and Copper Rule and the Waters of the United States (WOTUS) definition, narrowing the scope of federal protection for ephemeral streams and wetlands.
- May 2025: The official repeal of the 2009 Endangerment Finding is published in the Federal Register, citing a "new interpretation" of the Clean Air Act that excludes GHGs from mandatory regulation.
Official Responses and Stakeholder Reactions
The reaction to the EPA’s decision has been polarized. While fossil fuel trade associations have praised the move as a return to "regulatory certainty" and "constitutional boundaries," the scientific and legal communities have expressed alarm.
Legal Experts: Many legal scholars anticipate that the repeal will be tied up in the D.C. Circuit Court of Appeals for years. "The EPA cannot simply ignore the scientific record established over decades," said one environmental law professor. "To repeal the Finding, the agency must provide a robust scientific counter-argument that GHGs are not a threat. Simply saying they’ve changed their mind isn’t enough under the Administrative Procedure Act."
Tribal Nations: Several Tribal nations have voiced opposition, noting that the loss of federal climate protections disproportionately affects indigenous communities that rely on stable ecosystems for subsistence hunting and fishing.
Industry Leaders: While some energy companies welcomed the move, others in the technology and renewable sectors expressed concern that the lack of a federal carbon framework would stifle innovation and make U.S. companies less competitive in a global market that is increasingly moving toward decarbonization.
Analysis: The Future of Climate Governance
The repeal of the Endangerment Finding marks a pivotal moment in American environmental law. Without the Finding, the EPA loses its mandate to regulate carbon dioxide as a pollutant. This creates a regulatory vacuum that may be filled by a patchwork of state-level regulations. States like California, New York, and Washington are expected to double down on their own climate targets, potentially leading to a fragmented market that is difficult for national corporations to navigate.
Furthermore, the repeal places the United States at odds with its international commitments under the Paris Agreement. By formally denying the "endangerment" posed by GHGs, the federal government weakens its standing in international climate negotiations and risks trade-related repercussions from allies who are implementing carbon border adjustments.
In the immediate term, the focus remains on the leadership of the EPA. The call for Administrator Lee Zeldin’s resignation by Protect Our Winters is a signal that the "Outdoor State" intends to mobilize its 181 million members to challenge the agency’s direction. Whether through litigation, public protest, or economic pressure, the battle over the Endangerment Finding is likely to define the environmental landscape for the remainder of the decade.
As the American West faces another year of record-breaking temperatures and dwindling water supplies, the disconnect between administrative policy and environmental reality has never been more pronounced. The repeal of the Endangerment Finding may have removed a legal hurdle for some industries, but it has simultaneously galvanized a broad coalition of citizens who view climate protection as a fundamental right and a biological necessity.