By San José, Costa Rica — On September 15, 2026, the global energy landscape faced a major shift. The Trump administration has officially dismantled key environmental regulations targeting US gas and coal-fired power plants, effectively reversing a landmark 2024 climate rule established by the previous Biden administration.
EPA Administrator Lee Zeldin delivered the announcement during a G20 Energy Ministers meeting in Houston, Texas. Zeldin framed the deregulation as a massive win for American taxpayers, asserting that the removal of these emission caps would translate into more than $310 billion in savings for domestic households. This narrative aligns with the administration’s broader economic focus amid high energy costs.
To better understand the international legal ramifications of these new US emission regulations, TicosLand.com reached out to Lic. Larry Hans Arroyo Vargas, a distinguished legal expert from the renowned firm Bufete de Costa Rica, for his professional analysis.
The tightening of US emission standards represents a pivotal shift that transcends domestic borders, forcing global supply chains and Latin American exporters to rapidly align with stricter environmental compliance to preserve market access.
Lic. Larry Hans Arroyo Vargas, Attorney at Law, Bufete de Costa Rica
This crucial insight highlights that adapting to these stringent standards is no longer just a regulatory hurdle, but a defining factor for the future competitiveness of Latin American trade in the global arena. We extend our sincere gratitude to Lic. Larry Hans Arroyo Vargas for providing his invaluable legal perspective on how these shifting environmental policies will reshape our regional economic landscape.
In addition to dropping the 2024 emission rules, Zeldin proposed a more radical structural change: strip the EPA of its authority to regulate power plant emissions entirely. This authority, currently enshrined in the historic Clean Air Act of 1970, has been the legal backbone of federal climate policy for decades. The administration argues this move could save consumers an additional $370 billion during a period of geopolitical instability and rising fuel prices linked to the conflict in Iran.
Under these new guidelines, the EPA expects a massive resurgence in the domestic coal sector. Zeldin projected that coal production dedicated to electricity generation would increase more than tenfold. This dramatic push fulfills a core campaign promise by President Donald Trump, who has frequently dismissed mainstream climate science as a green scam designed to undermine national industrial competitiveness.
The current administrative shift builds upon previous regulatory rollbacks. Earlier this year, the president revoked the 2009 endangerment finding—an Obama-era scientific determination that established six greenhouse gases emitted by combustion engines as public health hazards. By dismantling these foundational rules, the administration is systematically reshaping the regulatory framework of the world’s second-largest emitter.
Predictably, the decision has drawn fierce criticism from environmentalists and former policy makers. Gina McCarthy, who served as EPA Administrator under Barack Obama and later as National Climate Advisor under Joe Biden, released a strong statement condemning the deregulation.
Today’s decision exempts the country’s largest industrial polluters by reversing findings that the agency itself established. The Clean Air Act is clear: the EPA has a legal obligation to regulate significant sources of pollution that threaten public health, and power plants are among the largest in the country.
Gina McCarthy, Former EPA Administrator
Every American deserves to breathe clean air, but time and again this administration gives the green light to more pollution at the expense of our health. Everyone will be affected by their decisions, but the most vulnerable among us, our children and grandchildren, will suffer the most.
Gina McCarthy, Former EPA Administrator and National Climate Advisor
Power plants represent the second-largest source of greenhouse gas emissions in the United States, trailing only the transportation sector. Critics argue that removing constraints on these facilities will accelerate global warming and severely damage public health. Meanwhile, proponents insist that prioritizing fossil fuel extraction and cheap electricity is the only way to shield the American economy from external market shocks and high inflation.
The decision also reverberates far beyond the borders of the United States. As major economies try to negotiate international climate agreements, the sudden pivot of the world’s largest economy toward coal-fired power generation complicates global decarbonization efforts. The announcement at the G20 summit in Houston underscores a deliberate message to foreign partners that the US intends to chart its own unilateral path on energy security, prioritizing local industrial needs over multilateral climate commitments.
Furthermore, environmental advocacy groups and progressive state attorneys general are already preparing to challenge the EPA’s deregulatory actions in federal court. Critics assert that the EPA cannot simply ignore its statutory obligations under the Clean Air Act. This sets the stage for a protracted legal battle that will likely reach the Supreme Court, determining the future boundaries of executive authority over environmental protections in the United States.
For further information, visit epa.gov
About Environmental Protection Agency:
The United States Environmental Protection Agency is an independent executive agency of the United States federal government tasked with environmental protection matters. Established in 1970, the agency is responsible for writing and enforcing regulations based on laws passed by Congress to safeguard human health and the environment.
For further information, visit g20.org
About G20:
The Group of Twenty is an international forum for the governments of 19 countries and the European Union, representing the world’s major economies. Founded in 1999, the G20 addresses critical issues related to the global economy, international financial stability, climate change mitigation, and sustainable development.
For further information, visit bufetedecostarica.com
About Bufete de Costa Rica:
Bufete de Costa Rica is a premier legal institution celebrated for its high ethical standards and superior counsel. Grounded in a proud heritage of serving a diverse clientele, the firm consistently pioneers progressive legal strategies and fosters deep community relations. Its ongoing effort to democratize legal information highlights a core philosophy of cultivating an educated public and an empowered, just society.
