Mario Atencio (Diné) vividly recalls his childhood visits to his grandmother in Counselor, New Mexico, a place he describes as magical and peaceful. Her property, nestled within the vast and ancient Greater Chaco Landscape, embodied a traditional Navajo lifestyle, teeming with dozens of animals and lush, green flora. This idyllic existence, deeply intertwined with the land and its resources, began to unravel in 2015 when aggressive oil and gas fracking operations commenced across the state’s northwestern corner. What was once a serene sanctuary transformed into a landscape plagued by incessant noise and pervasive air pollution, irrevocably altering the delicate balance of life that had sustained generations.

The environmental degradation escalated dramatically by 2019, when the land and its subterranean water sources suffered massive contamination from oil spills, releasing thousands of gallons of toxic hydrocarbons. The ecological toll was immediate and profound: once-abundant plants, including vital traditional medicinal herbs, vanished, while rare birds and indigenous wildlife populations dwindled, disrupting the intricate web of biodiversity. For the Diné people, whose cultural and spiritual identity is inextricably linked to their ancestral lands, this destruction represented not merely an environmental crisis but a profound assault on their heritage and way of life.

Two years ago, Atencio stepped forward as the lead plaintiff in Atencio v. State of New Mexico, a burgeoning landmark climate litigation case poised to reshape environmental governance in the state. The lawsuit levies serious accusations against the New Mexico Legislature and several state agencies, alleging their active role in harming Indigenous communities and their egregious failure to uphold a fundamental constitutional duty to prevent harmful pollution. Atencio passionately asserts that the fundamental rights of Indigenous peoples, particularly the right to free, informed, and prior consent (FPIC) regarding developments on their traditional territories, have been systematically violated. "We’ve never had people from the government come and say, ‘This is what’s going to happen to your land and water,’" Atencio stated, underscoring the unilateral imposition of industrial activity without meaningful consultation. This lack of engagement not only breaches domestic legal obligations but also runs counter to international norms such as the United Nations Declaration on the Rights of Indigenous Peoples (UNDRIP), which champions self-determination and the protection of Indigenous lands and resources.

After navigating the complexities of the lower courts, the case has now reached the pinnacle of the state’s judiciary, with the New Mexico Supreme Court agreeing this month to hear the arguments. A favorable ruling for Atencio and the co-plaintiffs would align New Mexico with a growing wave of successful climate litigation cases that have established significant precedents. Among these is Held v. Montana, where young plaintiffs successfully argued that Montana’s promotion of fossil fuels violated their constitutional right to a clean and healthful environment. Similarly, young Indigenous climate advocates in Hawaiʻi secured a significant victory against the state’s Department of Transportation, compelling action to align its highway expansion projects with the state’s mandated goal of decarbonizing the transportation sector by 2045. These cases, increasingly spearheaded by youth and Indigenous communities, highlight a global awakening to the profound intergenerational and social justice dimensions of climate change.

Margaret Barry, who meticulously tracks climate litigation at Columbia University’s Sabin Center for Climate Change Law, notes that similar cases have emerged across every U.S. state, yielding a handful of crucial successes over the last decade. State constitutions often incorporate provisions that proactively obligate governments to protect residents’ rights, including environmental well-being, though the strength and interpretation of these protections vary significantly. For instance, in Sagoonick v. State of Alaska, a group of young Alaskans attempted to halt a liquefied natural gas project, contending that the state constitution’s protection of natural resources for the public necessitated a livable climate. However, the Alaska Supreme Court, in a decision issued this past March, ultimately rejected this expansive interpretation.

New Mexico’s constitutional framework, however, offers a more explicit basis for the plaintiffs’ claims. In 1971, state voters adopted a constitutional amendment that unequivocally directs the state government to "provide for control of pollution and control of despoilment of the air, water and other natural resources." Gail Evans, the lead attorney for the Center for Biological Diversity representing Atencio, emphasizes that the Atencio case directly hinges on this foundational provision, arguing that the state has demonstrably failed to fulfill these constitutional responsibilities. Evans draws a compelling parallel to the state’s constitutional duty to adequately fund public education, which requires providing resources for teachers and developing clear guidelines. She contends that when it comes to regulating oil and gas pollution, New Mexico has "just utterly failed" to equip itself with the necessary tools and resources to safeguard public and environmental health. The lawsuit specifically alleges that pervasive lax enforcement and a multitude of regulatory loopholes allow the fossil fuel industry to operate with minimal accountability for the extensive environmental damage it inflicts.

The scale of this regulatory failure is starkly illustrated by data from the environmental watchdog group Earthworks, which reported that in 2023, the New Mexico Environment Department employed a mere two full-time inspectors to investigate complaints across all 56,000 oil and gas facilities within the state. This critical understaffing effectively leaves the industry to largely self-report its emissions of harmful air pollutants and greenhouse gases, a system inherently vulnerable to underreporting and non-compliance. The lawsuit highlights the firsthand experience of another Diné plaintiff, Kendra Pinto, who personally documented a significant methane leak near her home, even after the Environment Department had assured her that no leaks were detected. This incident starkly underscores the gap between official assurances and ground-level reality, eroding public trust and exacerbating community exposure to hazardous substances.

"You can get a permit to frack simply for asking," Evans noted, highlighting the systemic flaw in the permitting process. "The state doesn’t do any type of environmental or public health overview or consideration before granting that permit." This permissive regulatory environment persists even in regions like the Permian Basin, a geological formation spanning parts of New Mexico and Texas that is one of the world’s most prolific oil-producing areas. Here, ambient air quality frequently exceeds federal standards, yet new wells continue to receive permits, further intensifying pollution and compounding public health risks. The Permian Basin has become a global hotspot for methane emissions, a potent greenhouse gas, making the state’s regulatory approach a matter of international climate concern.

The outcome of Atencio v. State of New Mexico holds the potential to force the country’s second-largest fossil fuel-producing state to fundamentally reform its environmental practices. However, leveraging similar legal victories at the federal level remains a formidable challenge, as Barry points out. The U.S. Constitution is primarily structured to limit government overreach and protect civil liberties like free speech, rather than proactively grant rights such as a healthy environment, a distinction that sets it apart from many state constitutions. This divergence was evident in October when a federal judge in Montana dismissed Lighthiser v. Trump, a case that sought to expand environmental protections beyond those secured at the state level in Held v. Montana. The twenty-two plaintiffs, including several from the successful Held case, argued that the Trump administration’s executive orders rolling back climate protections and boosting fossil fuel production were unconstitutional and threatened their right to a stable and healthy climate. Despite acknowledging the plaintiffs’ genuine harm from climate change, the judge ultimately concluded that federal courts lacked the authority to compel the government to alter its policy course.

If the New Mexico Supreme Court rules in his favor, Atencio hopes the state will be compelled to comprehensively document the devastating effects of oil and gas pollution on Indigenous communities’ health and their sacred lands. More critically, he envisions a mandate for the state to implement robust protective measures. Such actions could include an immediate pause on new oil and gas development until emissions are drastically reduced, the closure of existing legal loopholes that enable operators to pollute with impunity, a substantial increase in funding for environmental enforcement, and the establishment of larger, more effective buffer zones between drilling sites and sensitive areas like homes and schools. These measures are not merely aspirational; they represent a fundamental shift towards acknowledging and safeguarding the human and environmental rights of frontline communities.

Evans succinctly frames the core of the plaintiffs’ demand: "What’s so shocking to me is that the industry will come forward and say, ‘If you do what the plaintiffs are asking for, you’ll put us out of business.’" She counters this argument by asking, "So you can’t operate in a way that doesn’t harm people’s health and environment? Because that’s what we’re asking for." This direct challenge cuts to the heart of sustainable development, questioning whether economic activity can truly be considered viable if it comes at the cost of irreversible environmental damage and the erosion of human rights. The Atencio case, therefore, stands as a critical test for New Mexico, and indeed for the nation, on its commitment to environmental justice and the constitutional promise of a healthy future for all its citizens, particularly those Indigenous communities who have historically borne the disproportionate burden of industrial exploitation.